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1·Some, like carpenter ants, can undermine a home structure, while others interfere with the electrical units.

一些蚂蚁，比如木蚁，会破坏房屋结构，而另一些蚂蚁则会干扰电器装置。

2·This will lower the returns to all existing sellers and perhaps undermine the prise structure altogether.

这就会降低所有现在销售者的投资收益，并且大约会损害总的价格结构。

3·This will lower the returns to all existing sellers and perhaps undermine the prise structure altogether .

这就会降低所有现在销售者的投资收益，并且大约会损害总的价格结构。

4·This article refers to what PPD can undermine the special structure of thick crude oil, and crude oil viscosity and pour point reduction in the chemical agent.

本文所说降凝剂是指能破坏特稠原油的结构力，使原油粘度和凝点降低的化学剂。