1.approval n. 批准, 认可, 同意, 赞同

She smiled her approval.
她以微笑表示同意.

2.liable adj. 有义务的,应负责的,有...倾向

Every man is liable to error.
人人都可能犯错误。

3.gloomily ['glu:mili] adv. 黑暗地, 沮丧地

4.swamp n. 沼泽,湿地 v. 淹没,陷于沼泽

In the swamp we were beset by mosquitoes.
我们在沼泽地受到蚊子的围攻。