He wanted to call his wife, but always hung back.
他想给妻子打电话，但总是踌躇着。
My friend promised me to help me if we meet any wild beasts when we travelled through a forest, but when the bear came up, he hung back.
我的朋友答应，一旦我们在穿越森林时遇见野兽，他一定帮助我。但是当熊走近时，他却退缩了。
My friend promised me to help me if we meet any wild beasts when we travelled through a forest, but when the bear came up, he hung back.
我的朋友答应，一旦我们在穿越森林时遇见野兽，他一定帮助我。但是当熊走近时，他却退缩了。
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