I think we must do something to protect the environment.
我认为我们必须做些什么来保护环境。
The exam is very important to us, so we must take it seriously.
考试对我们很重要，所以我们必须认真对待。
In order to achieve our Chinese Dream, we must study and work hard.
为了实现中国梦，我们必须努力学习和工作。
Protecting ourselves is one of the most important things we must do.
保护自己是我们必须做的最重要的事情之一。
As parents, we must ask ourselves: Are we listening? Are we patient enough?
作为父母，我们必须扪心自问：我们在听吗？我们够耐心吗？
As middle school students, we must cherish our lives and keep away from drugs.
作为中学生，我们必须珍惜生命，远离毒品。
The situation is so urgent that we must take an effective way to solve the problem right now.
情况十分紧急，我们必须立刻采取有效措施解决这一问题。
I believe that we must move hand in hand in solving the problem of environmental pollution to create a bright future.
我认为我们必须携手解决环境问题以创造一个光明的未来。
Let us jump while we still have the strength! So, we must think of danger in times of safety and always be prepared for the worst.
趁我们还有力气，跳起来吧！所以，我们必须居安思危，未雨绸缪。
Just as we began to appreciate petroleum more after the 1970s oil crises, today we must start looking at water from a fresh economic perspective.
正如我们在上世纪70年代的石油危机后开始更加重视石油一样，如今我们必须开始从一个全新的经济视角看待水资源。
Whenever we are in trouble, we must never lose heart, but try to think of the way out.
每当我们遇到困难时，我们绝不能灰心，而是要努力想办法解决。
For our safety, we must follow the traffic rules on the way to school.
为了我们的安全，我们在上学路上必须遵守交通规则。
To live a low-carbon life, we must remember to turn off the lights when we leave the room.
要过低碳生活，我们离开房间的时候一定要记得关灯。
Even if it takes us three days, we must get the job done.
豁出三天时间，也要把它做好。
To learn a language we must follow the principle of gradual improvement.
学习语言必须遵循循序渐进的原则。
With power and to spare we must pursue the tottering foe.
宜将剩勇追穷寇。
Knowing is not enough; we must apply.
知道是不够的，我们必须实践。
Explain that life is a gift we must cherish.
让他们懂得，生命是一份珍贵的礼物。
Instead, we must take charge of our own destinies.
我们必须掌握自己的命运。
So we must move quickly to turn this initiative into reality.
我们必须迅速采取行动，将这一计划落到实处。
It is just a long and difficult road. And we must not give up.
虽然还有很长的路要走，但我们不会放弃。
This is the moment when we must come together to save this planet.
此刻，我们必须团结一心拯救这个星球。
Every day we must ask ourselves: have we done everything that we can?
我们必须每天都问自己：我们已经竭尽全力了吗？
Finally, we must never underestimate the power of human ingenuity.
最后，我们永远不能低估人类创造力的力量。
And we must not allow the perfect to become the enemy of progress.
我们绝不能容许完美成为我们进步的敌人。
Their future depends on the action we take now, and we must not fail them.
他们的未来取决于我们现在采取的行动，我们绝不能辜负他们。
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