253. Analyst blamed May's sluggish retail sales on unexiciting merchandise as well as weather, which was colder and wetter than usual in some regions, slowing sales of barbecue grills and lawn furniture.
请问, slowing在这里做什么成分呀? 用什么是ING形式呢? 是which is/are slowing的省略吗?另外259题好象也是这种,
259, Five fledging sea eagles left their nests in western Scotland this summer, bringing to 34 the number of wild birds successfully raised since transplants from Norway began in 1975.
这个和上面的253题是一样的思路吗? 解释上面说是什么"cause and effect" .不太明白... | 
