plain
单词辨析：
强调坦诚的、如实表达所思所想的。
She expected to have some plain and truthful answers.
她期待能得到一些坦率而真实的回答。
强调直言不讳的，即便可能使别人不悦。
To be blunt, many of the candidates only have a low level of English.
说得不客气一点，很多申请人英语水平都不高。
Her blunt words hurt him so much.
她唐突的话语大大地伤害了他。
强调直率的，即使事实令人不舒服或尴尬也要直言相告，不加以隐瞒。
The conversation between the two leaders was direct and candid.
两位领导人的谈话直率而坦诚。
What a brutally candid assessment!
真是无情的直率评价！
强调不拐弯抹角的。
Please give me a direct answer.
请正面回答我的问题。
She sometimes feels that her husband is too direct.
她有时觉得她丈夫太率直了。
强调有话直说的，不隐瞒自己的观点、意见等。
We have had a frank talk.
我们有过坦率的交谈。
He was perhaps not entirely frank with you.
他对你也许不完全坦诚。
指没有添加其他东西的，或没有装饰的。
Plain yoghurt was her favourite.
原味酸奶曾是她的最爱。
Her boyfriend bought her a plain gold ring.
她男朋友给她买了一枚式样简单的金戒指。
There is a plain wooden chair in front of the bookshelf.
书架前有一把朴素的木椅子。
指容易做或理解的，也指没有过多装饰或没有添加多余之物的。
This is a simple but effective solution.
这是一个简单而有效的解决办法。
That lady dressed with simple elegance.
那位妇人的穿着朴素而优雅。
The simple but delicious food in that restaurant is very popular.
那家餐馆的饭菜简单却美味，非常受欢迎。
指没有多余或特殊装饰的。
The couple liked their bedroom to be unadorned.
那对夫妇希望他们的卧室朴素无华。
The room is typically unadorned, with white walls and a tiled floor.
墙壁是白色的，地面铺了地砖，房间布置得特别朴素。
He only made an unadorned account of that activity.
他仅对那次活动作了不加文饰的记述。
相关例句：
Three officers in plain clothes told me to get out of the car.
3名便衣警察让我下车。
Why couldn't they call you plain Ann or Alice like the rest?
他们为什么不能像其他人一样，给你取个普普通通的安或艾丽斯的名字呢？
The Shakers believed that furniture should be plain, simple, useful, practical and of sound construction
震颤派教徒认为家具应当朴素、简单、有用、实用，并且结构合理。
Patterson pointed toward a plain cardboard box beneath a long wooden table.
帕特森指着长木桌下的一个普通的纸板箱。
The operation was plain sailing.
手术进行得顺利。
Her dress is severely plain.
她的衣着很简朴。