The machine should (test) ______ before it is put to use.
举一反三
- You can’t use the machine because it __________________ (not test) yet.
- Before operating the machine, we should carefully study the operator’s manual of a CNC machine tool.
- 英译汉 After the new machine was put into use, the production cycle was greatly shortened.
- You can't use the machine because it hasn't been _____(test) yet.
- Acronyms should be put in parentheses before the full term.