问题描述：
这里的OFF是什么意思.能不能在举两个例子
President Obama says his administration's efforts to boost the exports of U.S.goods and business around the world are off to a solid start.
President Obama says his administration's efforts to boost the exports of U.S.goods and business around the world are off to a solid start.
问题解答：
我来补答展开全文阅读