...便金属与腐蚀性介质隔开,是防止腐蚀的有型: 效方法,其中氧化处理、磷化处理、非金属涂层和金 (1)化学键力(chemical bond) 属镀层是较为常见的方法。
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你施加一个力,材料就会抵抗它,直到你有一个足够大的力来打破化学键。
You apply a force and the material will resist it until you have a force great enough to break the chemical bonds.
科学家们主要搞不懂的是,手机所释放的无线电波,连打断化学键或扰乱dna的冲击力都没有,又怎么可能导致癌症呢?
Scientists are mostly stumped as to how the radio frequency waves emitted by cellphones, which lack the punch to break chemical bonds or disrupt DNA, might cause cancer.
氢键不属于化学键,也不属于范德华力,是介于化学键和范德华力之间的一种由氢原子参与成键的特殊键型。
The hydrogen bond does not belong to the chemical bond, neither belong to the van der Waals force. It is a special kind of bond situated between the chemical bond and the van der Waals force.
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