or thirty kilograms
或者30公斤
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Finback was born more than ten meters long, weighing seven thousand kilograms, day can grow thirty kilograms to fifty kilograms, two or three years can become a whale.
长须鲸刚生下来就有十多米长，七千公斤重，一天能长三十公斤到五十公斤，两三年就可以长成大鲸。
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