可是八分仪的90°标度用作测量月球与天体的角距，事实证明是非常不够的，故约翰·伯德（John Bird）在18世纪50年代制作了一个完整的圆圈，其测量范围可达360°，测量效果好，但很笨重，在海上使用极为不便。
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John Bird was being hailed as a spiderman hero last night.
约翰·伯德昨晚被誉为“蜘蛛英雄”。
youdao
Big Issue founder and editor-in-chief John Bird has paid tribute to the two vendors and said everyone at the magazine was "absolutely devastated".
BBC: Birmingham stabbings: Attacker 'knew Big Issue victims'
John Bird, John Fortune, Barry Humphries, Willie Rushton, Ned Sherrin, John Wells went on making people laugh, and think about why they were laughing.
ECONOMIST: Political satire
The magazine's founder, John Bird, admits that these members of his salesforce are not strictly speaking homeless, but says that they are on the margins of society and thus part of the magazine's mission.
ECONOMIST: Romanies
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