Country mile:

A great distance.

極長的一段距離，很遠 √

例句：

The batter knocked that ball a country mile. 

擊球手把球打得遠遠的。

Be miles apart:

To be holding very different positions and therefore unlikely to reach an agreement.

意見不合 √

例句：

The two sides are still miles apart, so I doubt they'll reach an agreement on the contract today.

雙方仍然意見不合，所以我懷疑他們今天能否就合同達成協議。

Give (one) an inch and (one) will take a mile:

If one makes concessions for someone, that will embolden /?m?b??ld?n/ that person to take further advantage of one, instead of being content with what they have been given.

得寸進尺 √

例句：

If you let the kids stay up later on the weekends, they'll want to do it all the time. Give them an inch and they'll take a mile.

如果你讓孩子在周末晚睡，他們會想要一直這樣做。而且會得寸進尺。

Song for you（片尾曲）

Alan Walker、Noah Cyrus、Digital Farm Animals、Juliander - All Falls Down