There were no significant difference on operation time and drain time of the three groups (P>0.05);

三组手术时间和引流管放置时间无明显差异（P>0.05）；

youdao

After di water rinsing and before baking, a drain time of 5 minutes with an elevation change is recommended to remove standing water that may leave marks in the paint during baking.

去离子水洗后，烘干之前，推荐用一运输链驼峰，至少沥液5分钟，与除去在烘干过程中可在漆面上流下痕迹的水份。

youdao

Interns aren't supposed to be a drain on time, energy or resources.

因为实习生不应该成为雇主在时间、精力或者资源上的负担。

youdao

That includes house cleaning, administrative work, bookkeeping and other tasks that drain your time and energy.

FORBES: The Woman Entrepreneur's Dilemma: Why It's Time To Stop Cleaning Your Own House

One big reason chiefs are fleeing boards is that serving on a public board is a huge drain on time.

FORBES: Magazine Article

"The significant drain on time and resources companies face when scheduling and carrying out interviews means for many, it can be an expensive and time-consuming task, " says Matson.

BBC: Skype interviews: Is it more tricky to be grilled by video?