单词：platelets
n. tiny bits of protoplasm found in vertebrate blood; essential for blood clotting
platelets的用法和样例：
例句
- Platelets have a major role in hemostasis.血小板在止血中起主要作用。
- A few small fuzzy blue platelets are seen.同时可见少数模糊的蓝色的血小板。
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