1.lose contact with 与…失去联系
例句：Unfortunately, evolution of tires and rims has made these measurements lose contact with reality.
不幸的是，外胎和轮圈的发展使这种测量方法越发与实际脱离。
2.lose face 失面子,丟脸
例句：If they don't want to lose face, the gifts should not be too cheap.
假如自己不想丢脸，那送出的礼物份量可不能太轻。
3.lose heart 灰心,泄气
例句：When you fail, you should never lose heart.
当你失败时，你不应丧失信心。
4.lose one's head 被砍头，丧命,慌乱,失去自制
例句：Don't lose your head.
别惊慌失措。
5.lose one's train of thought 被打断思路，忘记
例句：When you interrupted me, you made me lose my train of thought.
你打断了我的思考，我 忘记 我在想什么了。
6.lose track of 不能跟上…的进展，失去与… 的联系,看不清，算不淸
例句：When you are doing it, do you lose track of time?
是否每当你做这件事情的时候就会忽略了时间？