笫，zǐ ，与‘紫’同音，竹子编的床席。
全班共分成三个小组，我在笫三组。
The whole class was divided into three groups. I was in Group Three.
我们九点钟到达公园。全班共分成三个小组，我在笫三组。
We reached the park at nine o'clock. The hole class as divided into three groups. I as in Group Three.
我们九点钟到达公园。全班共分成三个小组，我在笫三组。
We reached the park at nine o 'clock. The whole class was divided into three groups. I was in group three.
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