2020欧洲杯时间

sine qua non

Use the expression sine qua non as an impressive way of describing something that's essential.

2020欧洲杯时间Chocolate chips are the sine qua non of chocolate chip cookies, for example, and wind is a sine qua non for flying a kite. The term literally means "without which not" in Latin, and it was originally a legal term. These days, it's used more generally to talk about anything that's necessary.

Definitions of sine qua non
1

n a prerequisite

Synonyms:
essential condition
Type of:
prerequisite, requirement
something that is required in advance

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