今天我们要学的词是 threshold. Threshold 是门槛，临界值的意思。

I have a low threshold for alcohol . 我酒量小。有研究显示，Women have higher threshold for pain than Men. 女性比男性抗疼痛的能力更强。YouTube announced that it has crossed the 1 billion visitors a month threshold. 视频网站YouTube宣布，他们已经突破了月访问人数十亿的门槛。Blackberry 10 reached the 100,000 apps threshold last week. 黑莓10应用程序总量上星期突破了十万的门槛。好的，今天我们学习的词是 threshold, threshold, threshold...