椎体转移极其少见，只有零星的个案报道。
Vertebral metastases are exceedingly rare, and only isolated case reports have described them.
到了晚上，这里到处都是漆黑一片，只有零星的几点灯光。
At night it is an expanse of darkness with only a few pinpricks of light.
直到近期，寒带气候一直保护欧洲远离这种病毒的袭击，只有零星的病例发生。
Until recently Europe's chilly climate protected it from all but a few sporadic incursions.
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