Crookes's tube
[医] 克鲁克斯氏管(X线真空管)
🧩 词语组成解析
🗣️ 情景例句
English is important for those who wish to do international trade.
英语对于那些想做国际贸易的人来说太重要了。
Work today,for you know not how much you may be hindered tomrrow.
今朝有事今朝做，明朝可能阻碍多。
It is almost always due to some very special circumstances that traces of land animals survive,
几乎总是由于某些特殊的条件，陆地动物的遗体才被存下来，