Pacesetter
n. 定速度者, 榜样, 标兵, 模范
✅ 同义词
🗣️ 情景例句
You were four or five years old, I think.
当时你才四、五岁 我想。
Let's leave the matter open.
这件事先上、悬着吧。
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。