全美五十个州均实施了强制使用安全带和儿童椅的法律。

All 50 states now have mandatory seat-belt and child-restraint laws.

youdao

全美五十个州均实施了强制使用安全带和儿童椅的法律。

All 50 states now have mandatory seat-belt and child-restraint laws.

youdao