ตัวอย่างการตรวจ English Proofreading & Editing ชุดที่ 19

Original

Edited

Since past 5 decades researchers and industrialist are working on improving the efficiency of EDM process. And they found an alternative method to improve the efficiency by adding powder in the dielectric media.

Over the past five decades, researchers and industrialists have collaborated to improve the efficiency of the EDM process. One alternative, highly effective option involved the addition of powder to the dielectric media.

Because: Correction of verb tense to the past, replace ‘5’ with ‘five’ and improve sentence construction.