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TOEFL IELTS BNC: 4841 COCA: 3896

laser

laser /ˈleɪzɚ/ noun
plural lasers
laser
/ˈleɪzɚ/
noun
plural lasers
Learner's definition of LASER
[count]
: a device that produces a narrow and powerful beam of light that has many special uses in medicine, industry, etc.激光器
often used before another noun常用于另一名词前

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