长城的基本高度约为9公尺(30呎)，了望台则高达12公尺(40呎)。

The basic wall is about 30 ft (9 m) high, and the towers rise to about 40 ft (12 m).

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1958年，澳大利亚科学家戴维·沃伦开发了一种飞行记录仪，可以追踪飞行高度和飞行方向等基本信息。

In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic information like altitude and direction.

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这种基质在体内不同的位置有不同的性质，但基本上它是一种高度水合或富水的凝胶。

That matrix has properties that vary in different locations in the body, but basically it's a highly hydrated or water-rich gel.

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That matrix has properties that vary in different locations in the body, but basically it's a highly hydrated or water-rich gel.

这种基质的性质,随其所在身体部位的不同而不同,但基本是高度水合的,即富含水的凝胶

耶鲁公开课 - 生物医学工程探索课程节选