/laɪn/
N-COUNT A line is a long thin mark which is drawn or painted on a surface; Draw a ~ down that page’s centre. line of latitude/longitude. International Date Line 国际日期变更线
PHRASE This shouldn’t take much longer. Mom’s on line to pay right now.
PHRASE out of line 字面是超过某条线，可以简单地理解成越界、不在一条直线上，这里的越界指的是真是存在，可以被看见的情况。I told you not to get out of line. Now, get back in line. 我告诉过你不要越界，现在回到你的队伍里。
可以引申为出格、过分、不合适的意思。可以用get/step out of line表示。
He was out of line when he talked back to his mother. 他跟妈妈顶嘴时有些过分了。
PHRASE There’s a fine line between helping your kids with their homework and doing it for them. There’s a fine line between a frown and a grimace. 这个表达用于指两件事很相似，以至于容易混淆，指微妙的差别。
PHRASE We have an exciting edition lined up for you. 为你准备妥当了