weak bond

基本解释

They are expected to update investors on how much of their holdings could be at risk of falling in value because they are backed by financially weak bond insurers.
由于为其所投资证券提供保险的债券保险商近来财务状况不佳，估计他们会向投资者就其所持有证券面临的减值风险作出更详细说明。
It is probably that the conjugated plane of gossypol is inserted into the base pair pleated sheet of the DNA double helical structure to associate with thymine through weak polar bond.
这表示棉酚很可能以共轭平面平行地插入到DNA分子双螺旋结构的碱基片层之间，与其中的胸腺嘧啶碱基以弱相互作用的极性键形成复合物。
The problem of early pavement damage and the weak interlayer bond issues will be solved by the result which has great utility value and far-reaching instructive meaning.
本文研究成果很好地解决了桥面铺装早期损坏与层间粘结薄弱等问题，具有良好的实用价值和深远的指导意义。

So what actually turns out the reality is that h e 2 does exist, but it exists as the weakest chemical bond known, and it wasn't, in fact, even found to exist until 1993, so I can assure you this is not a bond that you see very often in nature, and it is a very, very weak bond.
实际上He2键是存在的，但它是目前所知的最弱的键，直到1993年它才被发现，所以我可以向你们保证在,自然界你们不可能经常看到它，它是种非常非常弱得键。
麻省理工公开课 - 化学原理课程节选
So what we see is a bond order of 0, and again, the bond is very, very weak.
我们看到键序是0，同样的，键非常非常的弱。
麻省理工公开课 - 化学原理课程节选

However, a report out of the UK showing that money supply is barely moving and a weak bond auction in Italy has put traders back into uncertainty mode.
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He lost his audience then and never got it back, making it clear that the bond was weak from the start, partly because of those irritating happy feet.
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