Preferentially is the adverb: it tells you that something is done in a preferential way — not equally, but so as to give an advantage to particular people or things. A bank may lend preferentially to small shops; a school may admit local children preferentially; in science, a cell may take up one chemical preferentially.

PreferentiallyPreferentially is the adverb是副詞: it tells you告訴你 that something is done in a preferential way某件事是用偏袒、優待的方式進行的 — not equally不是平等對待, but so as to give an advantage to particular people or things而是刻意讓特定的人或事物占到便宜。A bank銀行 may lend preferentially to small shops可能會優先貸款給小商家; a school學校 may admit local children preferentially可能會優先錄取當地的小孩; in science在科學上, a cell細胞 may take up one chemical preferentially可能會優先吸收某一種化學物質

It is a formal, careful word, more at home in reports and papers than in chat. Though actually, everyday English often just says “they give preference to…” or “they treat X better,” and saves this long adverb for when the writer wants to sound exact.

It這 is a formal, careful word是個正式、謹慎的字, more at home in reports and papers比較常出現在報告和論文裡 than in chat而不是聊天時。Though actually不過事實上, everyday English日常英語 often just says常常直接說 “they give preference to…”「他們比較偏袒⋯」 or “they treat X better,”或「他們對X比較好」, and saves this long adverb而把這個長長的副詞留下來 for when the writer wants to sound exact用在作者想聽起來精確的時候

It always points back to that tilt: someone or something is being favoured on purpose. Do not mix it with preferably, which is a much more common word about what you would rather do.

It它 always points back to that tilt永遠指向那種傾斜、偏袒: someone or something某人或某事 is being favoured on purpose正被刻意偏袒著。Do not mix it with不要跟 preferablypreferably（比較好的話、最好）搞混, which is a much more common word about what you would rather do那是個常見得多的字，講的是你比較想做的事