Jennifer: Hey, Billy. What about surfboard leashes? Which ones are the best?
Billy: Actually, those are for wimps too. The real 1)extreme surfers don't need them. They didn't even have them back in the day.
Jennifer: But it's a safety issue. Leashes save lives by keeping you close to your board.
Billy: The only thing good about them is that they help you catch more waves.
Jennifer: But I was wondering if they can be dangerous themselves.
Billy: Only the old ones, cuz they 2)snapped back. The new 3)urethane ones are pretty safe.
Jennifer: I just don't know what to buy. They come in different lengths and widths.
Billy: The smaller the 4)diameter, the weaker the leash, but the less drag there is.
Jennifer: What about the length?
Billy: You need to have one that's at least as long as your board, maybe a little longer.
珍妮花：嘿，比利，衝浪板的腳繩呢？哪一種最好？
比利：其實，腳繩也是給膽小鬼用的。真正的極限衝浪者才不需要腳繩。何況以前根本沒這個玩意兒。
珍妮花：可是它是為了安全。腳繩可以讓你不至遠離衝浪板，救人一命耶。
比利：綁腳繩唯一的好處是它可以幫人追上更多的浪。
珍妮花：但我納悶腳繩本身是不是就有危險性。
比利：只有舊的比較危險，因為它們會突然彈回來。新的聚氨酯製的腳繩相當安全。
珍妮花：我不知道該買哪一種。它們有各種不同的長度和寬度。
比利：直徑愈短的腳繩愈脆弱，但阻力也愈小。
珍妮花：那長度呢？
比利：長度至少要跟衝浪板一樣長，或許更長一點。
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