The river lies as smooth as silk. 江平如练。
Lian He 练何
scour and bleach silk 练漂熟丝
drill; 操练
rehearse; 排练
capable and experienced; 干练
experienced and assured 老练
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)