“primary focal point”的概念、定义、翻译、参考文献-科学参考

单词	primary focal point
释义	primary focal point Physics 光学、声学光学 object-space focus物方焦点曾称“第一焦点(primary focal point)”。
随便看	nonprescription drug non pressure cure non-pressure cure nonpressure cure non-pressure water conveyance tunnel nonpressurized non-primary non-prime non-prime divisor non-prime ideal non-prime number non-primitive non-primitive character non-primitive root of unity nonprincipal nonprincipal character nonprincipal filter nonprincipal matrix nonprincipal ultrafilter non probability sampling non-probability sampling nonprobability sampling non-producing areas for agricultural products non-product contact surface non-productive fishery auxiliary vessel

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