1. But a single optical fiber with a diameter of less than half a millimeter can carry more information than a large cable made of copper wires.
    但是单单一根直径小于半毫米的光纤电缆就可以比由铜丝制成的粗电缆负载更多的信息。

2. The holes are only borings, less than a foot in diameter.
    油井仅仅是一些钻孔, 其直径不到一英尺.

3. The holes are only borings, less than a foot in diameter.
    这些洞只不过是一些钻孔，直径不到1英尺。

4. Some giant redwood trees measure 325 feet in height and up to 30 feet in diameter.
    有些高大的红木，测量高度有三百二十五英尺，直径宽达三十英尺。

5. It was five feet ten inches in diameter near the stump, and four feet eleven inches in diameter at the end of twenty-two feet, after which it lessened a little, and then parted into branches.
    根部附近直径是五英尺十英寸。树干二十二英尺处，直径为四英尺十一英寸。然后渐渐地变细，分出了枝桠。