Tombstones jutted out of the ground in broken clusters.墓碑三三两两地竖立在地面上。These small particles agglomerate together to form larger clusters.这些颗粒聚结形成较大的团。Sometimes several clusters of white clouds drift across the blue sky.蔚蓝...
...the way common letter clusters are usually pronounced in speech.普通字母组合在口语中的常见读法These are common consonant clusters at the beginning of words.这些单词的开头有相同辅音组合....clusters of men in formal clothes...一群群身着正装的男人Tombstones j...