table of binomial coefficients

例句：

1. 1. He sat at the table and ate his lunch.
   他坐在桌子旁吃午饭。
2. 2. The teacher placed the table on the floor.
   老师把桌子放在地板上。
3. 3. The table was covered with papers and books.
   桌子上铺满了纸张和书籍。