[00:03.81]a map maps

[00:08.52]a pet pets

[00:13.45]a spade spades

[00:18.52]a letter letters

[00:22.33]a

[00:25.43]一个

[00:28.53]pen

[00:29.36]钢笔

[00:30.20]map

[00:31.23]地图

[00:32.26]pet

[00:33.61]宠物

[00:34.95]spade

[00:36.41]锹

[00:37.88]letter

[00:39.03]信