Radioactive isotope
[机] 放射性同位素
🧩 词语组成解析
🗣️ 情景例句
There's nothing else in the appointment book.
在工作日， 没有别的事了。
In his defense, he still tried to justify himself.
为了保护自己，他一直试图证明自己的行为是正当的。
But can we blame those who looked and failed to see what Galileo saw, if we remember that to use a telescope at the limit of its powers calls for long experience and intimate familiarity with one's instrument?
但是，如果我们想到，便用一架倍数有限的望远镜需要长期的经验和对自己仪器的熟悉程度，那么我们怎么能去责备观察了天空但没有看到伽利略所看到的东西的那些人呢？