The number of twitchers has exploded in the past few years, with a few thousand members in two dozen clubs.
但在近几年里，观鸟的人数猛增，全国24家协会拥有几千名会员。
2
Africans will enjoy a new fascination with maps, thanks to the Internet, while soaring Numbers of twitchers in China will indulge in a new fascination with birds.
得益于互联网，非洲人将得享地图的新魅力，而中国珍禽观察者人数激增，他们将沉醉于观察鸟类。
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Keeping a single checklist may not be sufficient - twitchers often keep checklist for particular seasons or locations to keep track of just where they've seen the many birds on their life list.