There are scientific ways in which man solves problems.中为什么用

There are scientific ways in which man solves problems.中为什么用 There are scientific ways at which man solves problems. There are scientific ways in which man solves problems.这里in 翻译英语：There are scientific ways in which man salves problems. 英语语法there are different ways in which to address…这句话中in whic There are various ways in which individual,economic units ca There are many different ways in which people can volunteer, there are few ways in which he is an adult. There are always some ways helping you deal with problems.句中 are there any problems which remain____ 英语翻译There are several ways in which we can examine Chang Chi 英语翻译There are different ways in which people try to deal wit