My wife worried about my health. She said I was getting old and that this work must be difficult on me physically.

“我女儿抱怨说这是一份不怎么光彩的工作”，德田重男回忆说，“而我妻子则担心我的身体，她说以我这垂老之躯，这活儿肯定不轻松。”

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I did not want them to be difficult or to get in my hair while I was working on the computer.

VOA: special.2009.05.03

I'm not going to have you work long hours on difficult problems to be submitted and then graded.

我的作业不会让你们花费大量的时间,去钻研很难的问题，然后交上来让我打分。

麻省理工公开课 - 固态化学导论课程节选

And if they're a premade salad then it would be even more difficult because you're not constructing it yourself, so it's hard to uses based on these sort of things.

如果那是预制色拉,就更麻烦了,因为那不是你做的,就很难进行统计

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

In any event, if the majority of world opinion remains opposed to military action, it is likely to be difficult on the facts to categorise a French veto as "unreasonable".

BBC: SERVICES

Now, a commitment to interpersonal contact can be difficult to sustain on a global scale.

FORBES: The Social Media Fallacy: Real Leadership Means Face-to-Face, Not Facebook

Joel Greenberg, a partner at Kaye Scholer who specializes in mergers and acquisitions, believes the court ruling would be difficult to overturn on appeal.

FORBES: Market Scan