这种可调节的焦点使得宇航员能够执行诸如在一段时间内在昏暗光线下阅读小字清单的任务，然后用相同规格的一对镜片监测日常开销读数。
That adjustable focus allows astronauts to perform tasks like reading small-print checklists in low-light conditions on minute, then monitoring overhead readouts the next using the same pair of specs.
练习原理：你的身体能很快的适应重复的动作，但却需要一段时间来调节练习动作——这就是为什么你可以保持相同的练习动作。
Why it works: Your body quickly ADAPTS to the number of reps you perform, but it takes a while to adjust to the exercises you do. (That's why you can keep using the same exercises.)
低速风洞实验要求对实验段的风速有严格的控制，要求风速调节范围宽，精度指标高，调节速度快。
Low speed wind tunnel experiment requires strict of the wind speed, which requires a wild range of wind speed, high precision, and quick adjustment.
应用推荐