lacmus

例句：

1. 1. Bees collect nectar from flowers tomake honey.
   蜜蜂从花中采集花蜜制作蜂蜜。
2. 2. The bees are busybuilding their hives in the summer.
   夏天蜜蜂忙着筑巢。
3. 3. The bees usewax to seal the entrance of their hive.
   蜜蜂用蜡封住蜂巢的入口。