Toys with an end mass greater than 0.02 kg (0.04 lb) shall have cord length less than 50 cm (20 in. ) measured when rotating at 80 r/min.

末端质量大于0.02公斤（0.04磅）的玩具上的绳在以80转每分钟的速度旋转时长度应小于50厘米（20英寸）。

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The door had been tied shut with a length of nylon cord.

这扇门已经被一段尼龙绳紧紧栓住了。

《柯林斯英汉双解大词典》

The spinal cord is less then two feet in length and is the same diameter as your index finger, yet it contains over 10 billion nerve cells.

脊髓只有不到两英尺长，它的直径也只相当于你的食指粗细，但是在它之中有超过一百亿的神经元细胞。

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So, go ahead and get the first-grader a Firefly if you must (we prefer two tin cans and a very long length of cord).

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The coiled cord is tangle-resistant and easier to manage, while the length permits users to handle their device anywhere in the car while still charging.

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Compatible with most USB chargers, the coiled cord is tangle-resistant and easier to manage, while the 6 ft. cable length provides better mobility while in use.

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