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Ensure the guard is in place before operating the machine.
一定要在防护装置放到位后再开机器。
《牛津词典》
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QQ password guard the machine, increasing QQ security, local security guard.
守护本机QQ密码登陆，增加QQ安全，守护本机安全。
youdao
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QQ password guard the machine, increasing QQ security, local security guard.
守护本机QQ密码登陆，增加QQ安全，守护本机安全。
youdao