After this safety evaluation, safety classes for each slope project need to be categorized.
经过此次安全评估工作后，应对评估为不同安全等级的防护工程分类采取相应措施。
Regulations such as minimum operating age, restricted operating areas and compulsory classes in water safety are essential.
诸如最低操作年龄、限制操作区域和水上安全必修课等规定是必不可少的。
Safety concerns have driven the middle classes into gated compounds and tourists into all-inclusive resorts.
考虑到安全问题，中产阶级都搬到封闭的建筑物里，旅客们住在囊括一切的旅游胜地。
To ensure children's safety, all kindergartens, primary and middle schools in Wenchang, Sanya, Qionghai and Haikou, have suspended classes from Thursday to Friday.
为确保儿童的安全，包括文昌、三亚、琼海和海口等在内的各市幼儿园、中小学从周四到周五停课。
In America, with its weak social safety net and limited student aid, students are far more likely than their counterparts in, say, France to hold part-time jobs while still attending classes.
由于脆弱的社会保证体系以及有限的助学金，美国的大学生比起其他国家的大学生，更可能在课外从事兼职工作。
Classes cover biochemistry, bird biology and nutrition, food science and technology, and human and animal health and safety.
课程包括生物化学，鸟类生物学和营养，食品科学和技术，人类和动物的健康与安全等。
However, even when children have completed swimming classes, parents should still supervise swims and make sure pool fencing and other safety features are in place.
尽管如此，甚至在孩子们完成游泳课程以后，家长还应该监督他们游泳以及确保泳池防护和其他安全措施到位。
Classes in lab safety and quality control will also be required.
同时需要在安全和质量受控制的实验室进行课程学习。
MFC provides a number of classes that allow threads to synchronize access to objects to maintain thread safety.
MFC提供许多类别，这些类别允许执行绪同步物件的存取，以维护执行绪安全性。
September 14, Huaibei Mining Mine Safety Supervision Bureau for the stone, "three violations" organizes classes.
9月14日，淮北矿业安监局为石台矿“三违”人员举办学习班。
September 14, Huaibei Mining Mine Safety Supervision Bureau for the stone, "three violations" organizes classes.
9月14日，淮北矿业安监局为石台矿“三违”人员举办学习班。
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