Spirocyclane

螺環(huán)烷(專指:螺戊烷)

??? 情景例句

Who's your favorite celebrith?
你最崇拜的名人是誰(shuí)?
No rule without an exception.
沒(méi)有一條規(guī)則沒(méi)有例外。
Just as Mrs.Richards was entering the dinning room, there was a knock on the front door.
理查茲夫人剛剛走進(jìn)餐廳,前門就傳來(lái)敲門聲。
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