區別是：
get through 指的是向某人講清楚自己的意思。
get across 指的是使觀點、主意等被理解。
例句辨析：
get through
1、An old friend might well be able to get through to her and help her.
也許一個老朋友能讓她明白並且幫助她。
2、He could not get through to me while he was talking about his special field.
他談到他的專業時，我就聽不懂了。
3、Mary could hardly get through to jack.
瑪麗幾乎無法使傑克明白她的意思。
get across
1、I had created a way to get my message across while using as few words as possible.
我想出了一種能言簡意賅地表達自己意思的方法。
2、Well, to sum up, what is the message that you are trying to get across?
那麼，概括來說，你想要傳達的資訊到底是什麼？
3、Your thesis wouldn"t get across if you used too many technical terms in it.
如果你用了過多的專門術語，你的論文就不會被人理解。
區別是：
get through 指的是向某人講清楚自己的意思。
get across 指的是使觀點、主意等被理解。
例句辨析：
get through
1、An old friend might well be able to get through to her and help her.
也許一個老朋友能讓她明白並且幫助她。
2、He could not get through to me while he was talking about his special field.
他談到他的專業時，我就聽不懂了。
3、Mary could hardly get through to jack.
瑪麗幾乎無法使傑克明白她的意思。
get across
1、I had created a way to get my message across while using as few words as possible.
我想出了一種能言簡意賅地表達自己意思的方法。
2、Well, to sum up, what is the message that you are trying to get across?
那麼，概括來說，你想要傳達的資訊到底是什麼？
3、Your thesis wouldn"t get across if you used too many technical terms in it.
如果你用了過多的專門術語，你的論文就不會被人理解。