Self-improver
n. 自我改善；自我修养 (self-improvement的变形)
🧩 词语组成解析
self
[self]
n. 自己;本人;本性;私利;
adj. 同一的;纯净的;单一的;
vt. 使自花授精;使近亲繁殖;
vi. 自花授精;
n. 改良者, 改善者\\n[化] 改进剂; 助发剂; 助白剂
🗣️ 情景例句
The children's performances brought down the house.
孩子们的演出博得满场喝彩。
No. I've been in California for the past month.
没有，我刚到加利福尼亚去了一个月。
and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.
我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。