School-boy
n. 男学生；学童
🧩 词语组成解析
school
[skul]
n. 学校;上学;学院;群;
vt. 训练，锻炼;教育，教导;约束;给…上学;
boy
[bɔɪ]
n. 男孩，少年;儿子;小伙子，家伙;服务员;
🗣️ 情景例句
Sorry, but he is out at the moment.
抱歉，他现在出去了？
Operator, you gave me a wrong number.
总机，你给我接错号码了。
and we control it by means of the mud which we circulate down the drill pipe.
我们让泥浆顺着钻杆向下循环，用这种方法来控制压力。