“有效”造句

如果使用得當(dāng)，避孕套是很有效的避孕手段。
Condoms are an effective method of birth control if used with care.

服用避孕藥是最有效的避孕方法。
The pill is the most efficient method of birth control.

記下信用卡卡號(hào)，核對(duì)有效期限。
Make a note of credit card numbers and check expiry dates.

• #有效