当进行试验时必须符合本标准第4条的规定。的翻译：4th when the test must meet the standard requirements. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

When tested must comply with this standard the provisions of section 4.

4th when the test must meet the standard requirements.

When carries on the experiment must conform to this standard 4th stipulation.

When a pilot must be in conformity with the standard, the provisions of article 4.

4th when the test must meet the standard requirements.