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/โฟ้ว เขิ่ล เร้ ฉี่ โยว/
/F OW1 K AH0 L R EY1 SH IY0 OW2/
/fˈəʊkəl rˈeɪʃiːˌəʊ/
ฝึกออกเสียง
1
ผลลัพธ์ สำหรับ
focal ratio
ลองค้นหาคำในรูปแบบอื่น:
-focal ratio-
,
*focal ratio*
ภาษา
WordNet
(3.0)
WordNet (3.0)
focal ratio
(n)
the ratio of the focal length to the diameter of a (camera) lens system
,
Syn.
stop number
,
speed
,
f number
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