语言学家对俚语没有简单明确的定义，但他们一致认为，俚语是一种不断变化的语言现象，存在于世界各地的亚文化中。俚语是一种非正式的词汇(单词、短语和语言用法)，常见于口头交谈，但在正式写作中避免使用。因为俚语并不总是从字面意义上讲得通，所以您需要熟悉每个俚语的意思和用法。英语俚语是日常英语的重要组成部分。
儒琴今日英语俚语 （English Slang of the Day)
bite the bullet
英文解释
to accept something difficult and try to live with it；decide to do something difficult or unpleasant that one has been putting off or hesitating over.
To do or accept something unpleasant, often after a period of hesitation. The phrase is thought to have come from the military, perhaps because biting a bullet was a common practice for patients, due to a lack of anesthesia. （thefreedictionary）
中文解释
咬紧牙关应付，硬着头皮应付；勇敢地面对；迎着困难上。这句话据说认为来自军队，可能是因为在没有麻醉的情况下，咬子弹是病人减轻痛苦的常见做法。
原文举例
Running to the UN Won’t Bring a Palestinian State Closer. Abbas Has to Bite the Bullet and Talk to Trump.
奔向联合国并不能更早建立巴勒斯坦国。阿巴斯不得不咬紧牙关和特朗普对话。
Should we just bite the bullet and wait until 2020 to vote Trump out of office?
我们是否应该咬紧牙关，等到2020年用投票让特朗普下台?
