| 单词 | going up and down |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔course〕Aircraft can avoid each other by going up and down, as well as by altering course to left or right.飞机可以通过上下升降和左右移动改变航线来避免相撞。柯林斯高阶〔course〕Aircraft can avoid each other by going up and down, as well as by altering course to left or right.飞机可以通过升降以及向左或向右改变航向来避免碰撞。外研社新世纪 |
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