12月 7日 星期三 天气：晴
今天，我在妈妈单位写作业，妈妈的办公室里有一个天平。
Today, I do my homework in my mother's office. There is a balance in my mother's office.
我要去看天平，妈妈领我去看，只见天平上有二个小盘子，听说叫“托盘”我要称一瓶墨水，我把它放在右边的一个托盘上，其实应该放在左面的。妈妈说：“应该把物品放在左面的托盘上，砝码放在放在右面的托盘上”，然后我就称量起来，我数了一下放在左面托盘上砝码，有100克、50克、10克和1克。这四个砝码一共是161克，这说明墨水瓶重161g。
I'm going to look at the balance. My mother showed me to look. There are two small plates on the balance. It's called "tray". I want to weigh a bottle of ink. I put it on a tray on the right, but it should be on the left. My mother said, "we should put the items on the left tray and the weights on the right tray". Then I weighed them. I counted the weights on the left tray, including 100g, 50g, 10g and 1g. The four weights are 161 grams in total, which means that the ink bottle weighs 161 grams.
今天真快乐啊，我学会认识天平了！
Today is so happy, I learned to know the balance!