have been obtained by experiments 实验得到了
many experiments have been 大量的实验研究
experiments have been conducted 进行了试验研究
He says there have been experiments to turn excrement into a kind of microwave that can be used as a source of energy.
瑞斯·伯尔曼说,现在已经有实验在尝试将粪便转变成一种微波,以作能源之用。
Einstein's ideas have been tested by experiments performed since his death, and as most of these experiments support traditional quantum mechanics, Einstein's approach is almost certainly erroneous.
爱因斯坦的想法在他死后的实验中得到了验证,由于这些实验大多支持传统的量子力学,爱因斯坦的方法几乎必然是错误的。
You'd better not do any experiments until your glasses have been repaired.
在你的眼镜修好之前,你最好不要做任何实验。
And in these experiments we not only need to learn what has been learnt, but also have to learn what it is that we don't know.
在这些试验里我们不仅,要知道已知的知识,还要知道,我们不知道的内容。
Someone of you may know that there's been experiments in which, for one reason or the other, the two halves of the brain have been separated.
你们中可能有人知道,有些实验曾经,出于某种实验目的,将大脑分为两部分。
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