Examlex
The more massive a star,the more hydrogen it has to burn,and the longer its main-sequence lifetime will be.
Condoms
Barrier devices used during sexual activity to reduce the probability of pregnancy and the transmission of sexually transmitted infections (STIs).
Sexually Transmitted Infection
an infection transmitted through sexual contact, caused by bacteria, viruses, or parasites.
Young People
Individuals in the stage between childhood and full adult maturity, often encompassing teenagers and young adults.
Contraceptive Methods
Various techniques or devices used to prevent pregnancy.
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