1.B spend time in doing something,in可以省略
2.haxe trouble in doing something in可以省略
应该是第二个吧.twice 强调次数,这里麻烦不能说几次麻烦,而是说双重的麻烦,所以B比较好
1.B spend time in doing something,in可以省略
2.haxe trouble in doing something in可以省略
应该是第二个吧.twice 强调次数,这里麻烦不能说几次麻烦,而是说双重的麻烦,所以B比较好