3) protect 保护 跟 against， 表示 防止，防御，against 以防，制止，阻止，例如，Exercise will not only lower blood pressure but possibly protect against heart attacks.
I wish more and more students can be aware of this problem and try to do what we can to ______________.
大自然保护协会发起了一场激烈的野猪清除战役，甚至还用上了直升飞机和神枪手。Two years ago， Francis worked with the Conservancy to include his farm in a county farmland protection program.
