例句與造句

1. The machine has a large working chamber , which can carry out symmetrical operations in alternation , thus making it easy to be operated and highly efficient
   該機有一個輪番工作的大工作室進行兩個工位的作業(yè)，操作方便，效率高。
2. It's difficult to find symmetrical operation in a sentence. 用symmetrical operation造句挺難的