strictly weak digraph

例句：

1. 1.This strict diet is designed to help people lose weight.
   这种严格的饮食是为了帮助人们减肥。
2. 2. The strict rules made it difficult for the students to follow.
   严格的规则使得学生难以遵循。
3. 3. The strict manager enforced a high standard of work.
   严格的经理要求工作达到高标准。