sub-主題

sub

[sʌb]

n.潛艇, 替代品
vi.替代 
vt.轉包合同

例句與用法：

I had to sub for the referee, who was sick.

裁判病了，我得代為裁判。

詞形變化：

動詞過去式: subbed | 動詞過去分詞: subbed | 動詞現在分詞: subbing | 動詞第三人稱單數: subs |

英文解釋:

名詞 sub:

a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States

同義詞：bomber, grinder, hero, hero sandwich, hoagie, hoagy, Cuban sandwich, Italian sandwich, poor boy, submarine, submarine sandwich, torpedo, wedge, zep

a submersible warship usually armed with torpedoes

同義詞：submarine, pigboat, U-boat

動詞 sub:

be a substitute

同義詞：substitute, stand in, fill in

同義詞

stand in | substitute | fill in | deputize | represent | act | replace | shoe | second | submarine | hoagie | poor boy | grinder | wedge | hero | submarine sandwich | hoagy | torpedo | pigboat | Cuban sandwich | U-boat | hero sandwich | bomber | Italian sandwich |

反義詞

super |

以上來源於大辭典