We have been in this cave for some time now and the air is becoming bad.

我们在洞穴里已经待了一段时间，空气已经变得很糟糕了。

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AS MWD of PET widens, the thermal performance of PET chips is becoming bad.

随分子量分布加宽切片的热性能变差。

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With the increased angularity index of the manufactured sand, the fluidity of the new mortar is becoming bad but the intensity and contractibility is improving after the hardening process.

随着机制砂棱角性指数的增大，新拌砂浆的流动性变差，但硬化后砂浆的强度和收缩性能得到适当的改善。

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The fiscal cliff will represent a bad economy becoming a worse economy with no resolution.

FORBES: Make Believe: What if there is a resolution to the fiscal cliff?

We can no longer make believe that the fiscal cliff resolution or evolution will represent a bad economy becoming a good economy.

FORBES: Make Believe: What if there is a resolution to the fiscal cliff?

Waugh said the Bad Sex Awards were becoming "the most important literary event in the country".

BBC: Faulks beats Starr in bad sex award