枯死的树腐烂了，只好被连根拔掉。

The dead tree decomposed and had to be uprooted.

如果我们要度量同步的成本，这些优化实际上害了我们，因为我们不知道有多少同步会被优化掉(在这个例子中，很可能是全军覆没！)

If we're measuring the cost of synchronization, these optimizations really hurt us, as we don't know how many synchronizations (potentially all of them, in this case!) are being optimized away.

被包围的凶物-标志着被他人策反而掉去继承权的王室后裔。

Battune Sinister - Marks a royal descent that is barred by illegitimacy from succession to the throne.

掉鳄鱼眼泪。

To shed crocodile tear.

如果火山变得不活动并冷却下来，围岩就可能被剥蚀掉。

If the volcano becomes inactive and cools, surrounding rock may be worn away.