keep from ; stop from ; block from;

keep from ; stop from ; block from;   prevent from   be willing to do/be unwilling1 to do   water    at 100 degrees.   A: boiling       B:boiled   C: boils         D:is boiled   E: is boiling   Kilometer   kilogram=kg   She is so beautiful that she is dismissed.   She is too beautiful to go to school.   You are too young to smoke.   You are so young that you can’t smoke.   Fall into  fall in love   They fell in love at the first sight.

1 unwilling   

adj.不情愿的

参考例句：

• The natives were unwilling to be bent by colonial power.土著居民不愿受殖民势力的摆布。
• His tightfisted employer was unwilling to give him a raise.他那吝啬的雇主不肯给他加薪。