rest position的用法和樣例：
例句
- If the mass is displaced from its rest position and released, it will oscillate up and down.
質量如果離開它的靜止位置后再釋放，將作上下振蕩。 - When the galvanometer reads zero the circuit is in the null-balance position.
當檢流計的讀數為零時，電路處於零平衡位置。 - The bar would naturally tend to fall down from the top vertical position, which is a position of unsteady equilibrium.
棒子會有自然的趨勢從最高的豎直位置下落，那是一個不穩定的平衡位置。
