大卫把每幅图片都研究了两遍，又仔细阅读了图片说明的翻译：David studied each picture twice, and carefully read the photo caption 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

David to have studied each picture twice, and carefully read the caption

David studied each picture twice, and carefully read the photo caption

David has all studied each picture two, also read the caption carefully

David Each picture is research through twice, and read carefully the Photo caption

David studied each picture twice, and carefully read the photo caption