机翼 

Pinyin: jī yì
Meaning：Wing
Sentence: 他的座位在机翼上方，所以看不到窗外的许多景色。He have a seat over the wing, so cannot see much out of the cabin window.

More: 

机：

Pinyin: jī 
Meaning: Chance; engine; flexible; machine; occasion; organic; pivot; plane
Radical: 木 
Stokes: 6
Traditional: 機 
Common words/Phrase: 
机器 [jīqì] 【machine; engine】 
飞机 [fēi jī] 【aircraft; aeroplane; plane】
机会 [jī huì] 【chance; occasion; opportunity】
机能 [jī néng] 【organic】
机构 [jī gòu] 【institution】

翼： 

Pinyin: yì 
Meaning: Wing
Radical: 羽
Stokes: 18
Traditional: 翼
Common words/Phrase:
翼缘板 [yì yuán bǎn] 【flange slab】