barrel tumbling

例句：

1. 1. The barrel was so full that it started to tumble over.
   桶装得太满，开始摇晃。
2. 2. The barrel tumbling down the hill made a loud noise.
   桶从山上滚落发出巨响。
3. 3. The barrel tumbling down the hill made a loud noise.
   桶从山上滚落发出巨响。