透彻理解的英文：
gain a insight into

gain是什么意思：
v. 获得；获利；增加；走快；到达
n. 增加；利润；收获

No pains, no gains.
不劳则无获。

This ticket will gain you admission [will gain admission for you].
这张票将使你得以入场。

Its gain is the product of the gains of its constituent branches.
它的增益等于它含有的分支的增益的积。

insight是什么意思：
n. 洞察力；洞悉
into是什么意思：
prep. 进入…中；进入…状态；持续到；输入