题目内容：

英语翻译
1.到某时为止
2.比某人年轻或资历浅
3.专心致志于某事

优质解答

1.so far; ever since; 到某时为止
2.(A和B指代某人)A is younger than B A比B年轻; A has less experience
than B A比B资历浅；
3.be engaged in sth; concerntrate on sth; 专心致志于某事