I did an experiment in chemistry class.

　　化學(xué)課我做了一項(xiàng)實(shí)驗(yàn)。

　　I need a new lab partner for chemistry class.

　　我想找個(gè)人和我在化學(xué)實(shí)驗(yàn)課同組。

　　Clark and Vicky are talking after chemistry class.

　　上完化學(xué)課后，克拉克與薇琪在聊天。

　　He skipped chemistry class three times last month.

　　上個(gè)月他翹了三次化學(xué)課。