Tracerlab
同位素示踪物实验室
🗣️ 情景例句
I had planned to wear them.
我早就预备戴它们。
We have every reason to cancel the contract because you've failed to fulfil your part of it.
我们完全有理由取消合同，因为你们没有完成应遵守的合同内容，履行合同。
Not that long ago!I'm not more than twenty-nine myself.
不，没有那么久。我自己现在还没29岁呢。