At the referee's first whistle, the swimmers shall return without undue delay to the starting position.
At the referee's first whistle, the swimmers shall return without undue delay to the starting position.
总裁判第一声哨响，运动员迅速跳入水中。
At the referee's first whistle, the swimmers shall return without undue delay to the starting position.
总裁判第一声哨响，运动员迅速跳入水中。