The tiny rocket is attached to the spacecraft and is designed to propel it toward Mars.
微型火箭附在宇宙飞船上,用来推进飞船飞向火星。
| repel 排斥;击退;抵制 | Magnets with like poles repel each other. 同极的磁铁互相排斥。 |
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| expel 驱逐;开除;排出 | The student was expelled from school for bad behavior. 这名学生因行为不端被学校开除。 |
| dispel 消除;驱散(疑虑、恐惧等) | He tried to dispel the rumors about the company's financial troubles. 他试图消除关于公司财务困境的谣言。 |
| compel 强迫;迫使(外在压力) | The law will compel employers to provide healthcare benefits. 法律将迫使雇主提供医疗保健福利。 |
| impel 推动;驱使(内在动力) | A sense of duty impeled her to speak out against injustice. 一种责任感驱使她发声反对不公正。 |
| be / feel compelled to do 觉得必须做某事(外在动力/压力) | President Nixon felt compelled to resign due to the Watergate scandal. 尼克松总统由于水门事件觉得必须辞职。 |
| be / feel impelled to do 觉得必须做某事(内在动力/强烈愿望) | I feel impelled to point out that you are making a dangerous mistake. 我感到有必要(内在冲动)指出你正在犯一个危险的错误。 |