available accessory是什么意思 available accessory怎么读
available accessory的用法和样例
- A radio is an accessory to a car.
收音机是汽车的附件。 - The pinhole is a useful refracting room accessory because it can provide an estimate of potential acuity with optical correction.
小孔试片是验光室有用的附件之一，因为它能预计可采用光学矫正的潜在视力。
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