plain
[ADJ, NOUN]
plainer , plainest
1. 纯色的
A plain object, surface, or fabric is entirely in one colour and has no pattern, design, or writing on it.
双语例句
例：In general, a plain carpet makes a room look bigger.
一般来讲，纯色的地毯使房间显得更大。
例：He placed the paper in a plain envelope.
他把论文放进一个空白信封里。
2. 朴素的
Something that is plain is very simple in style.
双语例句
例：It was a plain, grey stone house.
这是一栋简朴的灰色石头房子。
3. 清楚的
If a fact, situation, or statement is plain, it is easy to recognize or understand.
近义词
双语例句
例：It was plain to him that I was having a nervous breakdown.
我那时神经衰弱，他是清楚的。
4. 相貌平平的
If you describe someone as plain, you think they look ordinary and not at all beautiful.
双语例句
例：a shy, rather plain girl with a pale complexion.
一个害羞、相貌平平、脸色苍白的女孩。
ADJ. 形容词
plains
1. [C 可数名词] 平原
A plain is a large flat area of land with very few trees on it.
双语例句
例：Once there were 70 million buffalo on the plains.
这片草原上曾经生活着7000万头水牛。
NOUN. 名词
in plain clothes
1. （警察）穿便衣的
If a police officer is in plain clothes, he or she is wearing ordinary clothes instead of a police uniform.
双语例句
例：Three officers in plain clothes told me to get out of the car.
三名便衣警官叫我从车上下来。
PHRASE. 习语
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