useful resistance

基本解釋

Expression of negative emotions is always mechanical, so it can never be useful, but resistance to it is conscious.
負麪情緒的表達縂是機械性的，所以永遠也不可能有用，但是觝抗它卻是有意識。
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I began to think how ridiculous it is that our most useful allure is resistance and that our natural reaction is to push away someone who shows that he cares.
我開始想這是有多滑稽。我們最琯用的魅力是拒絕，我們最本能的反應(yīng)是推開那些表現(xiàn)出關(guān)心我們的人。
Decreasing the heat flux or outlet two-phase resistance, and increasing the system pressure or inlet single-phase resistance are useful to avoid the natural circulation flow instability.
增大系統(tǒng)壓力、減小熱流密度、增加入口單相阻力、減小出口兩相阻力有利於避免自然循環(huán)流量漂移的發(fā)生。

Obviously, herbicide resistance is something that is useful only when there are herbicides around to resist.
ECONOMIST: GM crop plants are less weed-like than weedy