They say NATO should conduct more visible exercises to rehearse the response to threats at home.

他们说，北约应该举行更加显著可见的演习，来排练对国内所受威胁的反应。

youdao

If you are in any doubt as to whether you should be doing these exercises, consult your doctor.

如果你拿不准是否应进行这种锻炼，咨询一下医生好了。

《牛津词典》

If I had known the exercises should be handed in today, I'd have finished them yesterday.

如果我知道今天要交练习题，我昨天就会把它们做完了。

youdao

Ball says adults should start off with exercises at the base of the pyramid, like walking or climbing stairs.

VOA: standard.2010.02.26

Sir Liam said the 60 minute target for children should include exercises that target the bones, muscles and overall flexibility at least twice a week.

BBC: NEWS | Health | Exercise 'five times a week' call

Simulation exercises should involve key players from the farming community.

BBC: At a glance: NFU disease report

The conspicuous, delayed test run proved that the LEMV could take off, steer and land smoothly, and started a series of exercises that should culminate in combat trials over Afghanistan at the start of 2013.

ENGADGET: US Army's LEMV spy blimp spotted hovering over New Jersey, may take up cargo duties (video)