■ birth

涉及分别的多人时，可以用复数。

• (the study) has been following several thousand twins since their births in 1994 and 1995.（这次调查）追踪了几千名双胞胎，从他们 1994 与 1995 年出生时起（参见 life, death 条）。

• in question
• inside
• insist
• inspire
• instead
• instead of
• instead 与 stead
• institute
• institution
• instruct
• intent
• intention
• intention
• intent 与 intention
• interest
• interested
• in terms of
• internalize
• in the air
• in the air 与 on the air...
• in the first place
• in the past year
• in the past year 与 last year
• into
• intrigue