言下之意的英文：
hidden meaning between the lines

参考例句：

The implication seems to be we have to do some extra work today.
那言下之意似乎是我们今天得加班了。

hidden是什么意思：
adj. 隐藏的；神秘的
v. hide的过去分词

The priest was hidden behind the screen.
牧师被挡在祭坛围屏后。

Geologists uncovered hidden riches.
地质学家发现了地下的宝藏。

The ground was hidden by a white fume.
地面上笼罩着一层白色的水汽。

meaning是什么意思：
n. 意义；含义；意图
adj. 意味深长的

That was a mean trick!
那是卑鄙的诡计！

A modifier that has little meaning except to intensify the meaning it modifies.
修饰语除了加强修饰词的意思之外没有实际意义。

get money by dishonest means
非法赚钱, 得不义之财

between是什么意思：
prep. 在...之间；私下；来往于…之间；由…分担（分享）；总共
adv. 在中间

Between ourselves
秘密地说

Interaction between systems or between properties of a system.
系统间或一个系统的各种特性之间的相互作用。

You have your choice between the two.
在这两个之中，你有选择权。