Meteor showers and individual streaks of light that flash across the sky every night are generated when tiny flecks of celestial detritus, often no larger than a grain of sand or pebble, which burns up as it speeds through the atmosphere.
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lkid 2015-10-11 16:50:57
When引起的状语句子结构不完整，没有谓语；often no larger than…修饰复数的tiny flecks of celestial detritus，因此，使用复数形式的grains of sand or pebbles比单数的a grain of sand or pebble更为合适
liqijie3242656 2014-08-09 16:42:30
fragment，when状语从句中少谓语
liqijie3242656 2014-08-09 16:43:45
grains of ..用复数要好些，因为对比对象为复数
calmdream 2015-07-04 15:13:30
fragment
Jessicajy 2015-06-16 20:33:28
often no larger than…修饰复数的tiny flecks of celestial detritus，因此，使用复数形式的grains of sand or pebbles比单数的a grain of sand or pebble更为合适 when引导的从句没有谓语
