Definition: a unit of mass equal to 1000 grams, or 2.2 pounds Level: A2
这封信的重量不到一公斤。
This letter weighs less than one ___kilogram.
我买了两公斤苹果。
I bought two ___kilograms of apples.
宝宝一个月重了一公斤。
The baby gained one ___kilogram in a month.
