sheer: ad.（作定语)“完全的，纯粹的；陡峭的，垂直 的” e.g. a.He won by sheer luck. 他全靠运气取胜。 b.Such behavior is sheer foolishness. 那种表现愚蠢透顶。 c.sheer cliff悬崖 sheer: adj. （作定语）“完全的，纯粹的；陡峭的，垂直 的” e.g. a. He won by sheer luck. 他全靠运气取胜。 b. Such behavior is sheer foolishness. 那种表现愚蠢透顶。 c. sheer cliff悬崖