| 释义 |
fall back on (或upon)- 求助于，求…的支持，转而依靠：
Doctors sometimes fall back on old cures. 医生们有时求助于传统疗法。 - 退守，撤退：
The battle is going badly for us,we'd better fall back on the town in the hills. 战斗对我们越来越不利，我们最好退守到山中的小镇。 - 重提，回过来再谈，回到…上面来：
I must fall back upon what I said previously. 我必须言归正传。 - 往后退倒在…上：
The tired worker fell back on the bed and at once fell asleep. 疲倦的工人倒在床上就马上睡着了。
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