The baby weighed three kilos at birth.

婴儿出生时体重为三公斤。

《牛津词典》

He's lost a lot of weight—he's three kilos lighter than he was.

他的体重减了许多—比以前轻了三公斤。

《牛津词典》

I'd like to buy three kilos of apples.

我要买三公斤苹果。

youdao

On July 16th, they launched a new super-cuy, known as Peru, weighing up to three kilos (seven pounds).

ECONOMIST: The birth of the mega cuy

Sharon's doctors said he weighed 118 kilograms (260.2 pounds) at the time of the stroke, and has lost three kilos (6.6 pounds) since then.

CNN: Sharon heart operation set for Thursday

Twenty-one thousand Pakistani rupees for a four-kilo package, the farmer said, and he harvested three to four kilos per jirib (a local land measurement equivalent to about half an acre).

NEWYORKER: The Taliban��s Opium War