1.
You have to think about them. You have to experiment. You have to do exercises. And that takes many years as well.
你必须思考它们，你必须进行实验，你必须进行演习，这也将需要许多年。
2.
Article 16 Experimental animals that are newly introduced shall be subject to quarantine in isolation.
第十六条 对引入的实验动物，必须进行隔离检疫。
3.
To travel long distance you need to study geography.
要进行长距离旅行，你就必须研究地理。
4.
Inspection must be conduct by recognize surveyor .
检验工作必须由公认的商检员来进行。
5.
You must experiment, reason, think out new devices.
你们必须做实验，推理，想出新方法。
6.
You mush experiment, reason, think out new derices.
你们必须做实验，推理想出新方法。
7.
You must learn to think clearly.
你必须条理清楚地进行思考。
8.
You must have an electrocardiograph examination .
你必须进行一次心电图检查。
9.
You must play the game,that one is not.
你们必须按照规则进行比赛。
10.
You'll have to train hard before the next match.
下次比赛前，你必须努力进行训练。
11.
You must play the game in accordance with the rule.
你必须按照规则进行球赛。
12.
You must seek out the advanced experience of the masses,sum it up and popularize it.
你必须发现群众的先进经验，并加以总结和推广。
13.
The capacitors produced this week must be checked by100 percent.
本周生产的电容器必须百分之百地进行检验.
14.
The engine must be started and running for the following voltage tests.
引擎必须被启动，并按下列电压试验步骤进行。
15.
Inspection must be conduct before shipment by recognize surveyor .
检验工作必须在装船前由公认的商检员来进行。
16.
If data validation needs to be performed, the exchange type must be bidirectional.
若要进行数据验证，交换类型必须是双向的。
17.
All legs MUST be flown online, with real weather.
所有的航段飞行必须在线进行并使用真实天气.
18.
He had to spread out his management, seek new jobs and manage effectively to maintain profits.
为了做到有利可图，他必须在多方面进行管理，必须寻找新的施工任务，必须实行有效的管理。