plain

詞型變化：

名詞:plainness 副詞:plainly 形容詞比較級:plainer 最高級:plainest plain

詞意辨析：

apparent, obvious, evident, clear, plain, distinct, definite, manifest

這些形容詞均含“清楚的，明白的，明顯的”之意。
apparent: 強調顯而易見或一想便知。這個詞從動詞appear派生而來，故有時含有表面如此而事實上未必的意味。
obvious: 語氣較強，指極為明顯，有目共睹，無需說明和論證。
evident: 指根據事實成為顯然的。
clear: 普通用詞，側重清楚明白。
plain: 普通用詞，含義與clear很接近，可通用，但plain著重簡單明了，不複雜。
distinct: 較正式用詞，指輪廓的清楚或定義、含義的明確，不會弄錯。
definite: 語氣肯定，著重明白無誤，無可懷疑。
manifest: 語義較強，書面用詞，強調一目了然，暗示不要任何推論就一清二楚。plain

英文解釋：

名詞 plain:

1. extensive tract of level open land
   同義詞：field, champaign
2. a basic knitting stitch
   同義詞：knit, knit stitch, plain stitch

動詞 plain:

1. express complaints, discontent, displeasure, or unhappiness
   同義詞：complain, kick, sound off, quetch, kvetch

形容詞 plain:

1. clearly revealed to the mind or the senses or judgment
   同義詞：apparent, evident, manifest, patent, unmistakable
2. not elaborate or elaborated; simple
3. lacking patterns especially in color
   同義詞：unpatterned
4. not mixed with extraneous elements
   同義詞：sheer, unmingled, unmixed
5. free from any effort to soften to disguise
   同義詞：unvarnished
6. lacking embellishment or ornamentation
   同義詞：bare, spare, unembellished, unornamented
7. lacking in physical beauty or proportion
   同義詞：homely

副詞 plain:

1. unmistakably (`plain' is often used informally for `plainly')
   同義詞：obviously, evidently, manifestly, patently, apparently, plainly

例句：

1. The wind whipped across the plain.
   大風掃過平原。
2. It's plain that he is the criminal.
   很明顯，他是罪犯。
3. Such trees can be found in the plains.
   這種樹木可見於平原。