试题题干
Correct or improve the translation of the following Chinese sentences.
原文：于生效之日起，此协议有效期为三年。
译文：This agreement will become effective as of the effective date and will remain in effect for three years.
改译：
参考答案
试题解析
在法律条文、规章制度中，常用“shall”表示命令。这主要用于第三人称。此时，shall在意思上接近must。