莫逆之交的英文：
[Literal Meaning]
no/contradict/aux./friendship
a good constant and congenial friend

[解释]
莫逆：没有抵触。非常要好的朋友。

[Explanation]
bosom friends

[例子]
经过几次战斗后，这两个来自山东农村的年轻战士成了莫逆之交。

[Example]
After a few battles, the two young soldiers from a village of Shandong became bosom friends.

[英文等价词]
David and Jonathan
sworn friends

The two boys were sworn friends all the weekdays, and embattled enemies on Saturdays
这两个朋友平日是莫逆之交，一到星期六就是对阵的敌人。

Suspicion is the poison of true friendship
猜疑伤害莫逆之交

They became great friend.
他们成了莫逆之交。

It is very difficult for one to have an intimate friend.
一个人要有一个莫逆之交很难。

The two boys were sworn friends all the weekdays, and embattled enemies on Saturdays.
这两个朋友平日是莫逆之交，一到星期六就是对阵的敌人。

Enemies sometimes become friends, and competition sometimes turns into co-operation.
冤家对头可能变成莫逆之交。激烈竞争导致密切合作。