It's already common practice worldwide to limit students' use of mobile phones in primary and secondary schools.
限制中小学生使用手机已经是全世界的普遍做法。
2
It's already common practice in some countries to limit students' use of mobile phones.
限制学生使用手机在一些国家已经是很普遍的做法。
3
The safest way to practice Padmasana and related poses is to strongly rotate your thigh outward at the hip and not go deeper into the pose when you reach the limit of your outward rotation.