Along this line 20,000-ton coal trains can reach a length of over 7 km pulled by powerful electric locomotives over an extra heavy duty track and driving down operating costs.

大秦线上运行的两万吨运煤列车长度可达7公里，由大功率电力机车牵引，大大降低了运营成本。

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Numbering well under 50, the eastern North Pacific right whale --which can reach up to 18 metres (60 feet) in length -- falls below theIUCN's threshold of likely viability as a species.

长度可达18米（60英尺）的北太平洋东部露脊鲸，数目远在50以下， 低于世界自然保护联盟作为一个可能存活物种的起码数量。

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The tentacles of a box jellyfish trail behind it and can reach 15 feet (4.6 meters) in length.

一只盒子海蜇的触须牵引式的它能延伸到15英尺(4.6米)长度。

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Each one is knitting a message or epitaph to their loved one the size of an A4 sheet of page which will form part of an enormous scarf which, it is hoped, will reach a kilometre in length.

BBC: Scarf of Hope to remember Peru's missing