Perches
n. 鸟类的栖木；休息处；河鲈（perch的复数）
🗣️ 情景例句
Five points.
五分。
I learned history last month.
我上个月学历史。
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，