seventy

根據《柯林斯英漢雙解大詞典 》：

NUM Seventy is the number 70. 70; 七十

N-PLURAL When you talk about the seventies, you are referring to numbers between 70 and 79. For example, if you are in your seventies, you are aged between 70 and 79. If the temperature is in the seventies, it is between 70 and 79. 70多; 七十幾 (指70到79之間的數字)

N-PLURAL The seventies is the decade between 1970 and 1979. 70年代; 七十年代 (指1970 到1979之間的年代) ^[1] 

At Seventy 到七十

Or Seventy 或七十歲

Seventy Island 七零島

Seventy Eighth 七十八

Seventy Islands 洛克羣島所屬的七十島

Seventy elders 七十個長老

Seventy Years 七十年

Lesson Seventy 第七十課 ^[1] 

Seventy people were killed.

70人喪生。

Seventy thousand tons of oil spilled from the tanker.

7萬噸油從油輪漏出。

Seventy-two percent of people now work in service industries.

72%的人現今從事服務業。 ^[1]