镉对心脏和其他很多器官都有毒性，根据美国食品药物监督管理局的规定，人体接触镉的阈值很低（每天每公斤或每2.2磅体重0.21-0.36微克）。摄入可能引起胃部不适、恶心和呕吐。

再给你们说个有用的小窍门，就是从简单机械的角度讲，你的眼睛在快速看东西，比如从左往右瞄时，不是直直地、平平稳稳地扫过去的。你可以试试，闭上一只眼，用手按着，然后慢慢看对面的墙。你会发现眼睛是跳着看的。这有个专门的词，叫视动性运动，我听人说过好多回了。

The Peninsula Hong Kong has already been in business for close to a century, and although many of its precious traditions remain preserved to this very day, it has never rested on its laurels. Instead ...