Singlex
[计] 单工
🗣️ 情景例句
He ventured his life to rescue a drowning child.
他冒着生命危险去抢救一个溺水的孩子。
Life is not so short but there is time enougn for courtesy.
人生虽短，但表示礼貌的时间还是足够的。
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，