You use plainly to indicate that you believe something is obviously true, often when you are trying to convince someone else that it is true.
The judge's conclusion was plainly wrong.
法官的结论显然是错误的。
Plainly, a more objective method of description must be adopted.
显然,必须采用一种更客观的描述方法。
You use plainly to indicate that something is easily seen, noticed, or recognized.
He was plainly annoyed.
他明显是生气了。
I could plainly see him turning his head to the right and left.
我可以清楚地看到他左右摇晃着脑袋。
Something that is plainlypresented is presented in a very simple in style.
He was very tall and plainly dressed.
他个子很高,穿着朴素。