艰难情形是一种较情势变迁更为合理的原则。
那就是为什么我们的思维紧张或我们面临艰难情形时，呼吸频率会自动增加；
That is why when our mind has got tensed, or we face a difficult situation our respiratory rate is increased automatically and when our mind is calmed down, our respiratory rate slow down.
2009年，耐多药结核病的情形大致相同，这就提醒我们：既存在着威胁，也存在即使在最艰难的环境中也可控制这种威胁的模式。
In 2009, the situation is much the same for MDR-TB, an awakening both to the threat and to models that can control it even in the most challenging Settings.
要让加拿大的南方人切实了解了解北方艰难的生活是必要解释一下上述的紧张情形。
Underlying many of these tensions is a demand that southern Canadians acknowledge that life in the north is different.
正如叶芝所言，除却某些不可能的情形，我们于人生中所获取的满足皆取决于我们在多高的境界中选择我们所愿意面对的艰难困苦。
Short of the impossible, as Yeats put it, the satisfaction we get from a lifetime depends on how high we choose our difficulties.
于是，弗雷在一个三脚架上和雨林地面上都装上了Iconix摄像机，用来拍摄青蛙母亲在雨林艰难跋涉的情形；
Mr. Flay mounted the Iconix camera on a tripod and a track to capture the mother making her way across the canopy floor.
事实上，在艰难或危险的情形中表现出来的自我控制力，正是他超越那些为各种情绪而冲动的人之处。
In fact, in his own self-control under difficult or dangerous circumstances, lies his chief ascendancy over others who impulsively betray every emotion which animates them.
我感到很艰难，这事的情形很特别。
我感到很艰难，这事的情形很特别。
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