plainest

1.清楚的；明显的；浅白的easy to see or understand

2.坦诚的；直率的；直接的not trying to trick anyone; honest and direct

3.不尚修饰的；朴素的；简单的not decorated or complicated; simple

4.素的；无花纹的；单色的without marks or a pattern on it

5.[obn]极普通的；平庸的；平凡的used to emphasize that sth is very ordinary, not special in any way

be plain sailing

顺利；一帆风顺to be simple and free from trouble

in plain English

用平白的言语（或文字）simply and clearly expressed, without using technical language

(as) plain as a pikestaff|(as) plain as day|(as) plain as the nose on your face

一清二楚；一目了然；显而易见very obvious

1.平原a large area of flat land

1.(informal)（用于强调）简直，绝对地used to emphasize how bad, stupid, etc. sth is

1.发牢骚,诉苦;叹惜,悲伤;哀悼;悲歌,痛哭

1.丑,难看的

2.没有装饰的;平常的;朴素的;单色的,(织品)素净的;【印,纺】平纹的

3.平的,平坦的

4.平易的;普通的,简单的

5.明白的,清楚的

6.爽直的,直率的,坦白的

7.单调的,平淡的

8.淡泊的,(食物等)清淡的;粗陋的

9.彻底的,(傻瓜)十足的

10.【牌】(2-9点的)普通牌的

1.平;平易;明白,明了;坦白

1.平地,平原,旷野

2.〈英方〉(四面被建筑物包围着的)广场,小公园

3.〈诗〉战场;素织品,单色布

4.〈美〉(落基山脉东部的)大草原

1.easily seen or understood

2.simple in design, with no decoration; plain food is simple and does not have a lot of things added to it; not very attractive; used before a name for saying that someone does not have a special title or name

3.expressing what you think honestly, using simple, direct language

1.used for emphasizing that someone or something has a particular negative quality

1.a large flat area of land