Since the early 1990's, we've seen the introduction of resin balls, reactive resin balls and ultra-reactive particle balls. Now it seems there is a new bowling ball introduced every other day.
1990年初，开始有了胶质球的研发，而后又陆续推出更优质的微粒树脂，时至今日，似乎每天都有新球上市。
Since the early 1990's, we've seen the introduction of resin balls, reactive resin balls and ultra-reactive particle balls. Now it seems there is a new bowling ball introduced every other day.
1990年初，开始有了胶质球的研发，而后又陆续推出更优质的微粒树脂，时至今日，似乎每天都有新球上市。
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