hang back
phrasal verb with hang verb uk/hæŋ/ us/hæŋ/
（因害怕或缺乏信心而）犹豫，踌躇不前
to be slow to do something, often because of fear or having no confidence
There's no need to hang back - you can sing as well as anyone. 没什么可犹豫的——你会和其他人唱得一样好。
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