bound check

例句：

1. 1.The rope was bound to the tree with a strong knot.
   这根绳子用一个牢固的结绑在树上。
2. 2. The children were bound by their parents' rules.
   孩子们被他们的父母的规则所约束。
3. 3. The car was bound for the airport.
   车被绑定去机场。