The state of Malaysia's public toilets has become a hot-button issue, with tourists saying they were often dirty and lacked basic items such as soap and paper.

关于马来西亚公共洗手间卫生状况的问题已经成为人们街谈巷议的一个热门话题，外国游客对此更是怨声载道，他们声称那些地方总是显得很脏而且缺乏诸如香皂和卫生纸等必备物品。

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But despite the passage of time and the accumulation of supporting data, teaching evolutionary theory in the classroom is still a hot-button issue in some U.S. schools.

纵使时间推移，数据累积，在美国的一些学校，进化论能否进入课堂仍是一个热点问题。

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Stem-cell research remains a hot-button issue, but according to a new study, more people who've stored frozen embryos during fertility treatments are willing to donate them for stem-cell research.

干细胞研究仍然是个热点话题，但是据最新的一项研究，更多的在生育治疗中储存有冷冻胚胎的人们，愿意将他们的胚胎捐献出来用于干细胞研究。

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Were they expecting a reference to a hot-button issue would make their ad go viral?

FORBES: Free Advice: Don't Peg Marketing Plans To Natural Disasters

It is easy to understand why international adoption is a hot-button issue for many countries.

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Will he discuss gay marriage, a hot-button issue that will be on ballots in several key swing states?

CNN: Bush steps into the spotlight