The scientist had a lifelong ambition ____ groundbreaking discoveries in the field of medical research.

♦ Ambition for 
Meaning: উচ্চাকাঙ্খা।

• কোন কিছুর জন্য উচ্চাকাঙ্খা বুঝাতে Ambition for ব্যবহৃত হয়।
Ex: He has no ambition for fame in life.

• ambition এর সাথে upon, with, after এর ব্যবহার সঠিক নয়।

Complete sentence: The scientist had a lifelong ambition for groundbreaking discoveries in the field of medical research.