So if I let down my guard, if I rip off my scars

若我放松警惕揭开伤疤

let down v.放下；使…失望；松懈；把(衣服)放长；披散；放气

例句：

She let down the blind.
她把百叶窗放下了。

Let down a rope so that I can climb up.
放下绳子，让我爬上去。

He won't let you down; he's reliable.
他值得信赖，不会让你失望。

rip off 收取不合理的高价；宰客；偷窃

例句：

This saleswoman is trying to rip off the customer.
这个女销售员的行为即时宰客。

Kids were ripping off trays of rolls.
孩子们正在偷窃一盘盘的面包卷。

Cutting off a person's hand is a harsh punishment for thievery.
把手砍掉是对偷窃者的严厉惩罚。