1·That, I could understand perfectly.
这样，我就可以更好地理解了。
2·Joanna: I understand perfectly, David.
乔安娜：大卫，我完全理解。
3·Do you know what I'm saying? I understand perfectly.
你听懂我的意思了吗？完全明白。
4·You will understand perfectly that I cannot at present correspond with your father.
你一定完全了解，我目前不能写信给令尊。
5·"I understand perfectly," her father said. "That's exactly how your mother and I arrived at middle age!"
“我全知道了，”她爸爸说。“我和你妈妈就是那样一晃就到了中年了。”
6·The translator should understand perfectly the content and intention of the author whom he is translating.
译者须充分理解内容并完全明白作者的意图。
7·Owing to heavy commitments, they cannot advance delivery from June to April but they understand perfectly that July is the selling season for shirts in your market.
由于交货任务繁重，他们不能把交货日期从六月份提前到四月份。
8·I understand the plan perfectly, but I can't see where I come in.
我完全了解这项计划，可是不明白我能起什么作用。
—— 《牛津词典》
9·They characters have a lot in common, and they perfectly understand each other in bedroom.
他们个性上有许多共同点，在卧室里也能完美地互相理解。
10·Because healers understand the laws of nature perfectly, they have a complete trust in the universe (God).
因为治疗师们已经完全地理解了自然之法，他们对宇宙或神明有着完全的信任。