Sub-classes
(sub-class 的复数) 子集
🧩 词语组成解析
n. 补充人员, 部下, 潜水艇, 胶层, 订户, 傻子\\na. 附属的, 次级的\\nvt. 替代, 转包\\nvi. 替代\\n[计] 子程式, 用户, 代替, 减法器
n. 级别, 阶级（class复数形式）
🗣️ 情景例句
I wonder if you would take a look at the old library
我不知道你是否可以看一看旧图书馆
It's no use pumping a dry well.
徒劳无益。
It was my first flight. I was nervous when the plane took off.
我第一次坐飞机，起飞时我有点紧张。