on a small scale造句

1、The work had been only on a small scale but it suggested a solution.
这项工作只是小规模进行，但表明了一个解决办法。

2、The work had been only on a small scale but it suggested a solution
这项工作只是小规模进行，但表明了一个解决办法。

3、The catalyst was tested on a small scale hydrocracking apparatus.
在小型加氢裂化装置上对催化剂反应性能进行了考察。