众所周知，蜂鸟的翅膀拍打速度极快，它即可以凌空悬停，也可以快速向前飞行和向后飞行，其飞行的精准度甚至超过了直升机。

Hummingbirds are well known for their wing speed and ability to hover and fly forward and backward with more precision than a helicopter.

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Netra是一种便宜并易于安装的附件，通过和移动电话结合，可以快速便捷又不失精准的进行视力自我检查。

Netra is an inexpensive and easy-to-attach add-on for self-testing eyesight quickly, easily, and accurately with a mobile phone. Credit: Andy Ryan, MIT Media lab.

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相比之下，Insight专为开发人员和开发管理者设计，它快速和精准并且可以在整个过程中发挥作用并找出缺陷。

By contrast, Insight is designed for developers and development management — it's fast and precise and helps you find problems all along the way.

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