Shingling
压挤熟铁块, 叠瓦作用
🗣️ 情景例句
The little boy held his mother's hand firmly when crossing the street.
那小男孩过马路时紧抓着母亲的手。
Excuse me. Can you tell me where Main Street is?
劳驾，你能告诉我正街在哪里吗？
Ethanol is more effective at a concentration of 50-70 percent;
乙醇的浓度为50％至70％时比较有效，