干（乾）封：古县名。（1）唐麟德三年（公元666年）正月高宗封禅泰山，改年号为乾封，并改博城县为乾封县。治所即今山东泰安。总章初又改博城县，神龙初复改乾封县。宋大中祥符元年（1008年）改奉符县（2）唐总章元年（公元668年）分长安县置。治所在怀真坊（在今陕西西安市）。武周长安二年（公元702年）废入长安县。
通过壁后注浆封水，做到了干打井，改变了工人的作业环境，实现了优质高效。
By grouting behind the shaft wall, improved working conditions, and realized high speed and good quality of shaft construction.
对不起这是我干的，我错发了一封电子邮件给他们。
I am sorry to tell you that I did. I sent the wrong email to them by mistake.
用正交试验筛选鬼臼毒素冻干脂质体的优化工艺，并以HPLC法测定其包封率。
The orthogonal experimental design was used to optimize the preparation of podophyllotoxin freeze-dried liposomes. A HPLC method was used to determine the entrapment rate of the product.
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