🧩 词语组成解析
a. 掌上型；手持型
drill
[drɪl]
n. 操练;钻头;军事训练;（应对紧急情况的）演习;
vt.& vi. 钻（孔）;打（眼）;操练;训练;
vt. 作…演习，操练;
🗣️ 情景例句
especially when he's a baby.
特别是当他还是个婴儿的时候。
Don't teach your grandmother to suck eggs.
休要班门弄斧。
John works in a factory about ten kilometres from his home.
约翰在一家距离他家大约 10公里远的工厂工作。