Terms for subject Scientific containing either ... or

English	Chinese
Chemical changes either absorb energy or give off energy.	化学变化不是吸收能量、就是放出能量。
Nothing in nature will either start or stop moving of itself	自然界中没有一件东西会自行开始或停止运动。
Samples of material were extracted with either water or suitable organic solvents.	材料样品是用水或者适当的有机溶剂提取的。
The chemical can behave either as an acid or as a salt.	这化学物或起酸的作用或起盐的作用。