Result of my study that the problems of great drop line maybe have, which is an essential guidance for pipe commissioning.

研究了大落差管道可能产生的各种问题，对管道的投产具有重要的指导意义。

Drop me a line when you get there.

你到那儿后给我写封信。

Drop us a line, it's always great to hear from you.

给我们写封信，能收到你的信总是让人很高兴。

If you've made it this far, drop me a line and let me know what you think of the site.

如果已经看到这里了，有什么想法就请写信给我，让我了解您对本站的看法。

Users will gladly use the graphical interface, but, when its limitation is reached, many still happily drop down into the command line.

用户很乐意使用图形界面，但是，当它的极限到达时，大多数用户还是会很高兴的进入命令行。