每当我们遇到困难时，他们总来帮助我们。
每当学生遇到问题时，它都会非常耐心地帮助他们，而且从不感到厌烦。
Whenever students have problems, it helps them very patiently and never gets bored.
虽然每当你遇到一个红灯路口，心里有可能会暗暗诅咒，但城市规划者们确实在努力提高交通流畅程度，他们尝试让多盏信号灯实现同步，甚至依靠超级计算机来设计的最佳模式。
Though you might curse them at every red light, city planners do try to synchronize traffic signals to improve flow, even relying on supercomputers to design the optimal patterns.
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