有人看见他在实验室做实验。
我父亲是昨天晚上在实验室做实验的。
It was yesterday evening that my father did the experiment in the lab.
昨天晚上在实验室做实验的正是我父亲。
It was my father who did the experiment in the lab yesterday evening.
我哥哥在实验室做实验。
昨天他们在实验室认真地做实验。
这些具体的照片是在实验室中学生做实验时拍摄的。
These particular photographs were taken during an undergraduate laboratory session.
方式 地点时间昨天他们在实验室认真地做实验。
这些具体的照片是在实验室中学生做实验时拍摄的。
These particular photographs were taken during an undergraduate laboratory session .
这些具体的照片是在实验室中学生做实验时拍摄的。
These particular photographs were taken during an undergraduate laboratory session .
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