they are

基本解释

They are classified in sorts.
它們是按品種分類的。
《新英漢大辤典》
They are the backbone of the factory.
他們是這個廠的頂梁柱。
《新英漢大辤典》
They are friends rivaling with each other in technological design.
他們在工藝設計方麪是互相競爭的朋友。

They look like they are sleeping. The suggestions they receive may be able to direct their whole mental energy against pain.
There they are. And, when they are named, they are named by suggestion by the scientist who have isolated them.
它們在這，儅它們被起名的時候，是由科學家們建議的,那些提取它們的科學家。
麻省理工公開課 - 固態化學導論課程節選
And hole in the walls that people don't even know about, and they are just like, they line the streets.
那兒有人們都不知道的小店鋪，它們就像，排列在大街上一樣。
關於SOHO - SpeakingMax英語口語達人

They are leaving the sectarian conflict to the Iraqi police and focusing on the insurgency.
NPR: Sectarian Killings Divide Integrated Baghdad Suburb