例句與造句

1. The standard logarithmic visual acuity charts
   標(biāo)準(zhǔn)對數(shù)視力表
2. Standard logarithmic visual acuity charts
   標(biāo)準(zhǔn)對數(shù)視力表
3. It's difficult to find visual acuity chart in a sentence. 用visual acuity chart造句挺難的