useful resistance

基本解释

Expression of negative emotions is always mechanical, so it can never be useful, but resistance to it is conscious.
负面情绪的表达总是机械性的，所以永远也不可能有用，但是抵抗它却是有意识。
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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.
我开始想这是有多滑稽。我们最管用的魅力是拒绝，我们最本能的反应是推开那些表现出关心我们的人。
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.
增大系统压力、减小热流密度、增加入口单相阻力、减小出口两相阻力有利于避免自然循环流量漂移的发生。

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