Cows usually give birth to one calf every two to four years. At birth, elephants already weigh some 200 pounds (91 kilograms) and stand about 3 feet (1 meter) tall.

雌象每产下一只幼崽的时间是2至4年，幼象诞生时重约200磅(91公斤)，高约3英尺(1米)。

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They can grow more than a meter long and weigh up to 45 kilos.

他们最多可以生长到超过一米，体重高达45千克。

youdao

Burros reach an average height of over a meter and can weigh more than 225 kilograms.

驴子的高度平均为一米并能载重超过225公斤。

youdao

They can grow more than a meter long and weigh up to forty-five kilos.

VOA: special.2009.12.15