怀疑是智慧的开端。

债券市场是世界上最重要的市场。

地球及其周围的水域实际上必须具有其阴影所揭示的形状，因为它以完美的圆弧遮蔽了月亮。

Every drop of oil should be used efficiently and responsibly.

I think that we communicate only too well, in our silence, in what is unsaid, and that what takes place is a continual evasion, desperate rearguard attempts to keep ourselves to ourselves.