conserve strength and store up energy; 养精蓄锐
How much water can this reservoir hold? 这个水库能蓄多少水?
wear one's hair long; 蓄发
grow a beard 蓄须
have long entertained such ideas 蓄念已久
牛津高阶第八版
美国韦氏词典
Dictionary.com
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维基百科 (自由的百科全书)