A cockroach is a flat, fast insect, usually brown or black, that likes warm places with a little food and water. People picture dirty kitchens, though actually a clean kitchen can still have them if there are crumbs, a drip of water, and a crack to hide in. They come out mostly at night and run when the light goes on.

A cockroach Cockroach蟑螂is a flat, fast insect是一種扁扁的、動作很快的昆蟲，usually brown or black通常是棕色或黑色，that likes warm places with a little food and water喜歡溫暖、又有點食物和水的地方。People picture dirty kitchens大家想到的都是髒亂的廚房，though actually a clean kitchen can still have them但其實乾淨的廚房也可能有牠們，if there are crumbs, a drip of water, and a crack to hide in只要有麵包屑、一滴水，還有個能躲藏的縫隙。They come out mostly at night and run when the light goes on牠們大多在晚上出來活動，一開燈就會逃跑。

The word is ordinary and a bit disgusted: saying a place is full of cockroaches insults the place. People also use cockroach as a strong insult for a person they find disgusting or hard to get rid of — that use is rude.

The word is ordinary and a bit disgusted這個字很普通，但帶點嫌惡的味道：saying a place is full of cockroaches insults the place說一個地方「到處是蟑螂」等於在貶低那個地方。People also use cockroach as a strong insult for a person人們也會用cockroach來罵人，they find disgusting or hard to get rid of罵那種讓人噁心、或甩不掉的人——that use is rude這種用法很不禮貌。

In everyday English this insect is a cockroach, not “a beetle”, even if the body looks hard. It is a very common word; every household knows it.

In everyday English this insect is a cockroach在日常英文裡，這種昆蟲就叫cockroach，not “a beetle”不會說成「a beetle甲蟲」，even if the body looks hard即使牠的身體看起來很硬。It is a very common word這是個非常常見的字；every household knows it家家戶戶都知道。