常見例句The E optotype on the chart had 3 limbs of equal length.A regular geometric progression of optotype sizes and distribution was employed to arrange 14 lines with 4 optotypes on each line. 採用三劃等長的E形眡標(biāo)，眡標(biāo)大小及排列採用均勻的幾何增率，每行眡標(biāo)數(shù)爲(wèi)4個，共14行，每兩行眡標(biāo)變化進率爲(wèi)拶而。 返回 optotypes