Please note and understand
理解───understand;请注意───Please note that
He explained and explained, but I still couldn't understand.───他说了又说, 我还是不懂.
A baby can only receive sense impressions, but it can not understand them.───婴儿只能接受感官方面的印象, 而不能理解.
This classical poem is hard to understand.───这首古诗很费解.
He doesn't understand me, or at any rate not fully.───他並不了解我, 至少是了解得不全面.
He does not understand finance at all.───他对财务一窍不通.
I quite understand," he replied.───我很理解”，他回答道。
you understand French?───你懂法语吗？
I couldn't understand a sodding thing!───我他妈的一点儿都搞不懂！
I hope you understand what I.
To really understand a man we must judge him in misfortune.
understand yourself in order to better understanding others.
There needs a long apprenticeship to understand the mystery of the world’s trade.
He cannot understand why she's constantly carping at him.