限期使用的产品，标明生产日期和安全使用期或者失效日期；

With production date, safe-use period or date of invalidity if the product is to be used within a time limit;

隧道结构生命全过程由施工期 、 使用期和老化期三个阶段构成.

The life - cycle of tunnel structure is composed of construction stage, serving stage and aging stage.

大厦的使用期

Life span of a block

Groove 虚拟办公室可供个人免费使用，商务使用则可以有60天的评估使用期。

Groove Virtual Office is available at no cost for personal use or 60-day business evaluation.

无公害农产品由农业部门认证，其标志的使用期为3年。

The pollution-free agricultural products should be approved by agricultural department and the usage period of the certification mark is 3 years.

使用期五年，每月清洗晾晒20分钟可延长使用寿命。

It can be used for at least Five years, and monthly clean and 20min sun can prolong its life.

最佳的建筑常常建筑得很好,在超出了设计使用期后依然巍峨屹立.

The best buildings are often so well constructed that they outlast their original use.

本文在基于标准被废除按比例进行时的标准体系使用期的两个新模型。

In the note two new models for use life of standard system based on proportional method to abolish outdated standards are built.

这种化学物质明显地缩短了手套材料（使用期）。

This chemical clearly degrades the glove material.

上述优惠套装所包括之高球练习券有效使用期为三个月。

The validity of golf coupons that including in the captioned packages are for 3 months.