They range from mere specks scarcely visible with a powerful magnifying glass, to large black spots or clusters of large or small black specks sometimes quite plain to the naked eye. 佚名.神奇的知识之书.
There are two or three small clusters of Bedouin tents, but not a single permanent habitation. 马克·吐温.傻子出国记.
The ivy and the moss crept in thick clusters over the old trees, and the soft green turf overspread the ground like a silken mat. 查尔斯·狄更斯.匹克威克外传.
Filings do not adhere to the sides of the helix, but they cling in clusters to the ends of the coil. 伯莎M.克拉克.科学通论.
The nuts hang from the summit of the tree in clusters of a dozen or more together. 佚名.神奇的知识之书.
In a contribution on this subject submitted to the Royal Society in 1787 he announced the discovery of 466 new nebul? and clusters of stars. 李贝.西洋科学史.
In large genera the species are apt to be closely but unequally allied together, forming little clusters round other species. 查尔斯·达尔文.物种起源.