只有在这种时候，我们才可以直视太阳，即使万里长空没有一点云彩，不见一丝雾霭。 这就充分显示了低空尘埃的数量之大。 。

The enormous amount of this dust is well shown by the fact that then only we can look full at the sun, even when the whole sky is free from clouds and there is no apparent mist.

youdao

留意愤怒的早期信号——当愤怒的情绪已经出现的时候只有您自己知道这个危险的信号所以，您要在这种情绪开始的时候就认识到。

Watch for early signs of anger - Only you know the danger signs when anger is building, so learn to recognize them when they begin.

youdao

在这种情况下，在任何时候，union 所有分支上的连接操作中只有一个连接操作是活动的。

So in this case, exactly one of the joins that comprise the legs of the union is active at any given time.

youdao