Symmetrically is the adverb of symmetrical: it describes doing something, or something being placed, so that the result has matching halves. You arrange chairs symmetrically. Leaves grow symmetrically along a stem. A pattern repeats symmetrically across a cloth.

Symmetrically對稱地 is是 the adverb of symmetricalsymmetrical(對稱的)的副詞：it describes用來描述 doing something做某件事 or something being placed或某樣東西被擺放的方式 so that the result has matching halves讓結果左右對稱。 You你 symmetrically對稱地 arrange chairs擺椅子。 Leaves葉子 along a stem沿著莖 symmetrically對稱地 grow生長。 A pattern圖案 across a cloth在布上 symmetrically對稱地 repeats重複。

Because it is an adverb, it does a different job from the adjective, and this is worth feeling rather than memorising. The adjective tells you what a thing is: 'the room is symmetrical'. The adverb tells you how something was done or how things sit in relation to each other: 'the furniture is arranged symmetrically', 'the wings fold symmetrically'. If you can put 'in a matching, balanced way' in its place and the sentence still works, the adverb is right.

Because it is an adverb因為它是副詞 it does a different job from the adjective它的作用跟形容詞不同 and this is worth feeling rather than memorising這一點要用感覺去體會，而不是死記。 The adjective形容詞 tells you what a thing is告訴你某樣東西是什麼： 'the room is symmetrical''the room is symmetrical'（這房間是對稱的）。 The adverb副詞 tells you how something was done or how things sit in relation to each other告訴你某件事是怎麼做的，或東西彼此之間是怎麼擺的： 'the furniture is arranged symmetrically''the furniture is arranged symmetrically'（家具被對稱地擺放）、 'the wings fold symmetrically''the wings fold symmetrically'（機翼對稱地摺起）。 If you can put 'in a matching, balanced way' in its place如果你可以把『in a matching, balanced way』放進去 and the sentence still works句子還是通的 the adverb is right那用副詞就對了。

It shows up most in three kinds of writing. Description of design and architecture — how a garden, a facade, a stage is laid out. Science and maths — how a molecule is built, how forces are distributed, how a curve behaves symmetrically about a line. And instructions — fold the paper symmetrically, place the screws symmetrically around the plate.

It shows up most in three kinds of writing它最常出現在三種文章裡。 Description of design and architecture設計和建築的描述 how a garden, a facade, a stage is laid out花園、外牆、舞台是怎麼佈置的。 Science and maths科學和數學 how a molecule is built分子是怎麼組成的 how forces are distributed力是怎麼分布的 how a curve behaves symmetrically about a line曲線是怎麼沿著一條線對稱地表現的。 And instructions還有說明書 fold the paper symmetrically把紙對稱地摺起來 place the screws symmetrically around the plate把螺絲對稱地裝在板子四周。

It is a long word and a slightly technical-sounding one, so in speech people usually say 'evenly', 'on both sides', or 'the same on each side'. Though actually — evenly and symmetrically are not the same, and swapping them is the commonest real error.

It is a long word and a slightly technical-sounding one這是個很長、聽起來有點專業的字 so in speech people usually say 'evenly', 'on both sides', or 'the same on each side'所以在口語裡大家通常會說『evenly（平均地）』、『on both sides（兩邊都）』，或『the same on each side（每邊都一樣）』。 Though actually不過事實上 evenly and symmetrically are not the sameevenly跟symmetrically不是同一回事 and swapping them is the commonest real error把兩個搞混是最常見的真正錯誤。

Evenly is about amount and spacing: spread the butter evenly, space the posts evenly. Symmetrically is about mirroring around a centre: five posts spaced evenly along a wall are even but not necessarily symmetrical, while two posts placed the same distance from the door on either side are symmetrical without anything being spread.

Evenly Evenly is about amount and spacing講的是量跟間距： spread the butter evenly把奶油evenly地塗開、 space the posts evenly把柱子evenly地隔開。 Symmetrically Symmetrically is about mirroring around a centre講的是繞著一個中心互相對映： five posts spaced evenly along a wall五根柱子沿著一面牆evenly地隔開 are even but not necessarily symmetrical是even，但不一定symmetrical， while two posts placed the same distance from the door on either side而兩根柱子在門的兩邊、離門一樣的距離放 are symmetrical without anything being spread就算沒有把什麼東西鋪開，也是symmetrical。

When you mean 'the same amount everywhere', say evenly. When you mean 'balanced around a middle', say symmetrically.

When you mean 'the same amount everywhere'當你想講的是『到處量都一樣』 say evenly就用evenly。 When you mean 'balanced around a middle'當你想講的是『繞著中間平衡』 say symmetrically就用symmetrically。