单词:controllable check valve
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Module 4 [00:05.73]模块四 [00:07.47]The natural world [00:09.60]自然世界 [00:11.73]Unit 1 On the farm [00:14.25]单元一 在农场 [00:16.77]Sing a song [00:18.60]唱歌曲 [00:20.43]Old MacDonald has a farm E-i-e-i-o.On his farm he has five
Ali Baba's Farm Ali Ba-ba, he has a little farm. On his farm he has some little lambs. Baa, Baa cry his little lambs. On the farm of Ali Ba-ba. Ali Ba-ba, he has a little farm. On his farm he has some little cows. Moo, Moo cry his little cows. On the
The chicken and the duck were friends. They lived on a farm. They walked around together. They swam in the pond together. They talked about many things. They talked about the cat. They thought the cat was tricky. They thought the cat was dangerous. T
This is the VOA Special English Agriculture Report. A listener in Abuja, Nigeria, named Okorie wants to know more about fish pond farming. Bill Martin, president of Blue Ridge Aquaculture, with tanks of shrimp in Martinsville, Virginia Raising fish