sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What is the use of external crystal oscillator in microcontroller?
 sentence 2: Why do we need to use oscillator in microcontroller? sentence 1: What is the difference between the universe, the cosmos, space, and nothing?
 sentence 2: How can we say that before time there was nothing in the cosmos?
not same meaning
not same meaning
not same meaning