阻挡物 obstacle 防止无意识的直接接触，但不防止有意识的直接接触的部件。
n. obstacle
misc. restraining mass
衍射-声音虽然会被反射已经吸收，但是他能绕过阻挡物。
Diffraction - not only will a wave of sound reflect or absorb but it can go over the obstacle.
打开以后，把通风孔后面的黑色泡沫阻挡物移除，重新把所有东西组装回去。
Once open, remove the black foam stuck onto the back of the outside-facing vents and put everything back together.
莲花使用减速效果来模拟引擎制动，内燃机的内部有一个阻挡物为车辆减速。
This slowing effect is used by Lotus to simulate engine braking, in which resistance inside an internal-combustion engine decelerates the car.
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