The marketing team will review the efficacy of our new email campaign next week.

行銷團隊下週將檢討我們新電子郵件活動的成效。

Several clients questioned the efficacy of the updated software during the support call.

幾位客戶在客服電話中質疑更新後軟體的效用。

Before hiring more staff, management wants proof of the efficacy of current training programs.

在增聘人員之前，管理階層希望先看到現有訓練課程確實有效的證據。