such as safety classes
比如安全等级
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
youdao
Sometimes they're reluctant to take part in important training such as fire safety classes and child identification programs, which guard against abduction.
VOA: standard.2010.07.22
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