The lining of my vector images in Word turn BOLD when I convert to PDF
The left picture shows the Word file. The right side of the picture is the PDF file. As you can see the image in the PDF (which is a vector I copied from Illustrator) has a much bigger line thickness. If I place the same image in Word as a JPEG instead of a vector it turns out very unsharp and pixel-like.
Could anyone please help me how I can keep the image as a vector, but keep the original line-thickness in my PDF?
Thank you.

