Normally, this sort of single-step mixing would not work, because of the difficulty of getting two liquids to flow stably through one channel.

正常情况下，这种一步混合难以成功，因为使两种液体稳定地流过一个通道十分困难。

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The final step reinforces the adage to avoid mixing friendships and business.

FORBES: 3 Steps to Build the Right Team

"The tea bag water filter technology sounds good especially from the point of it being one step process, with out having to do any mixing, " said Nega Bazezew Legesse of Oxfam.

CNN: Nanotech and 'tea bag' to clean up drinking water