Dips

例句:

• In a moment's hesitation on the part of Mr. Snagsby, Bucket dips down to the bottom of his mind. 查尔斯·狄更斯. 荒凉山庄.
• I had reached one of those rare places where a Martian tunnel dips suddenly to a lower level. 埃德加·赖斯·巴勒斯. 火星战神.
• It had hardly started on one of its dips before his hands were moved in the proper direction to restore the balance. 鲁伯特·萨金特·荷兰. 历史性发明.

整理:威尔伯