He observes keenly, but says little.

他观察敏锐，但言语寥寥。

Olson also studies and observes the behaviour of babies.

奥尔森还研究并观察婴儿的行为。

He observes keenly but says very little.

他观察敏锐，但说得很少。

She simply observes the outward forms of religion.

她只是表面上信教而已。

All the beds are aired, and she never leaves the house, and observes, the window is open.

所有的床铺都通了风，她从来没有离开过屋子，你看，窗子是开着的。