对于强制性安全，应使用相应的权限类。
For imperative security, use the corresponding permission class.
已经证明，强制性安全带法律及其执法情况对于提高安全带使用率十分有效。
Mandatory seat-belt laws and their enforcement have been shown to be very effective at increasing seat-belt wearing rates.
已经证明，强制性安全带法律及其执法情况对于提高安全带使用率十分有效。
Mandatory seat-belt laws and their enforcement have been shown to be very effective at increasing seat-belt wearing rates.
应用推荐