这些工作往往使人身心疲惫，而且往往在肮脏并且令人难以忍受的酷热活着严寒的条件下工作。
The work is physically exhausting, mentally numbing and often performed in filthy and unbearably hot or cold conditions.
同样的，生活在山地的物种也会觉得酷热的低地难以忍受。
Similarly, most mountain-dwelling species find the sweltering lowlands unbearable.
夏天的酷热是不是难以忍受？
夏天的酷热是不是难以忍受？
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