花费了整整十个星期，每天九个小时，他用黑色毡尖笔小心翼翼地写下了他的留言。

For ten weeks, nine hours at a stretch, he carefully wrote his message with a black felt-tip marker.

youdao

花费了整整十个星期，每天九个小时，他用黑色毡尖笔小心翼翼地写下了他的留言。

For ten weeks, nine hours at a stretch, he carefully wrote his message with a black felt-tip marker.

youdao