名詞 boy:

1. a youthful male person
   同義詞：male child
2. a friendly informal reference to a grown man
3. a male human offspring
   同義詞：son
4. (ethnic slur) offensive and disparaging term for Black man

1. The stone just missed the boy.
   那塊石頭差點(diǎn)兒砸到男孩。
2. Don't cry, you are a big boy now.
   別哭，你現(xiàn)在已經(jīng)是大男孩了。
3. That boy is about ten years old.
   那個(gè)男孩大約有十歲。

boy

n.（名詞）
A male child.
男孩
An immature or inexperienced man, especially a young man.
毛頭小伙子：一個(gè)不成熟或無(wú)經(jīng)驗(yàn)的人，尤指青年人
A son:
兒子：
例句：
his youngest boy.
他最小的兒子

Informal A grown man; a fellow:
【非正式用語(yǔ)】 一個(gè)成年男子；小伙子：
例句：
a night out with the boys.
與小伙子們?cè)谕夤蔡幍囊煌?/br>
A male who comes from or belongs to a particular place:
來(lái)自或?qū)儆谀车氐哪腥耍?/br>例句：
a city boy.
城里人

Offensive A male servant, such as a valet.
【無(wú)禮用語(yǔ)】 男侍：男仆，如男侍
interj.（感嘆詞）
Used to express mild astonishment, elation, or disgust:
用于表示驚奇、頌揚(yáng)或厭惡：
例句：
Oh boy—what a surprise!
哦…真令人吃驚

來(lái)源：
Middle English boi
中古英語(yǔ) boi
possibly from Old French embuié [servant] [past participle of] embuier [to fetter]
可能源自 古法語(yǔ) embuié [仆人] [] embuier的過(guò)去分詞 [束縛]

【引伸】
boy.hood.
n.（名詞）