effective

This new medicine is very effective at reducing high blood pressure.

(Chinese) 这种新药在降低高血压方面非常有效。

Visual aids are an effective way to keep the students' attention.

(Chinese) 教具是保持学生注意力的有效方法。

The new tax law will become effective on the first of January.

(Chinese) 新的税法将于一月一日起正式生效。

Effective immediately, all staff must wear identification badges.

(Chinese) 即刻生效，全体员工必须佩戴身份证章。