名詞 balance beam:

1. a gymnastic apparatus used by women gymnasts
   同義詞：beam

1. The gymnast poised herself on the balance beam.
   體操運(yùn)動(dòng)員在平衡木上保持平衡。
2. She performed on the balance beam with much grace.
   她在平衡木上表演得非常優(yōu)美。
3. The girl lost her balance and fell off the balance beam.
   小女孩失去了平衡，從平衡木上摔了下來。