When a floating exchange rate proves to be an irritant rather than an emollient, fixing it once and for all has greater appeal.

当浮动汇率证实为刺激物而非软化剂，将汇率彻底的固定有着更大的吸引力。

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People here chew betel nut all the time. The seed itself is an irritant. Most of the patients suffer from oral fibrosis of mucous membrane.

这边的人习惯吃槟榔，槟榔本身就是刺激，病人嘴巴看起来大部分都是黏膜纤维化。

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Much as water in a bathtub is not a problem until it starts to overflow, pollen for many is not an irritant until it crosses a particular threshold, he said.

浴缸里的水溢出之前不会带来大问题，大量的花粉超过一定限度后就会成为刺激物了，他说。

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China's export prices may rise, but an American diplomat said the action "takes an irritant off the table in the U.S.-China relationship."

VOA: special.2010.06.25

Plans for a missile defense system in parts of the former Soviet bloc have been an irritant between Washington and Moscow.

VOA: standard.2009.09.17

"I think it takes an irritant off the table in the U.S.China relationship."

VOA: standard.2010.06.21

For Stevens, the net neutrality fight has morphed from an irritant to a genuine obstacle.

FORBES

While the mites were an irritant they were not necessarily a massive problem at first.

CNN: Unwelcome visitors cause havoc for bees

For a natural high, though, superhot chilis require unnatural care to process, because they are an irritant.

WSJ: Arms Race to Grow World's Hottest Pepper Goes Nuclear