vt.& vi. 使工作;使运作;操作;使产生效果;
n. 工作,操作;著作;工厂;行为,事业;
vt. 使工作;操作;经营;使缓慢前进;
🗣️ 情景例句
What about your arms? Lift your arms up like this.
你胳膊怎么样?手抬起来, 像这样。
The mechanic repairs cars.
机工修理汽车。
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.