Geologic features imply that liquid water once flowed across the surface, and volcanic activity, now dead, once flourished, recycling chemicals and minerals between the surface and the interior.

地质特征暗示着火星上曾经流动着液态水，而现在悄无声息的死火山也曾经一度繁荣，在地表和火星内部进行着化学物质交换。

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The particles can be transported through air or a hydrocarbon liquid without loss in enzymatic activity of the payload.

颗粒能通过空气或液态碳氢化合物运输，不会对有效负载的酶活性造成损失。

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The results showed that the activity of ionic liquid correlated strongly with its acidity, and only acidic ionic liquid had alkylation activity.

实验表明，离子液体的催化活性与其酸强度密切相关，只有在酸性条件下，离子液体对烷基化反应才有催化活性。

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On the one hand, a combination earnings growth and liquid capital markets will depress default activity across the general leveraged loan population, keeping the rate inside the historical average of 3.4%.

FORBES: Connect

It's expensive at 0.85% a year in fees, and very liquid, with 2 million shares a day of activity.

FORBES: Magazine Article