committed 是承诺或投入，坚定的意思，而insist则是坚持的意思。例如
If we know what we do, know that is right direction, then we should insist what we are doing, committed ourselves 100 percent, then we believe we will reach our goals. 如果我们知道我们做的是朝着正确方向，我们应该坚持我们所做的，百分百投入，就一定达到目的。
