secondhand

"The condition for getting a raise at work is meeting your quarterly targets. "

"My grandmother taught me how to bake cookies when I was a child. "

"firsthand knowledge"

"My grandfather smoked a cigarette after dinner every night. "

""At the hospital, Dr. Lee often shares her research with her colleagues." "

"My sister's birthday is next week, and we're planning a party. "

"The bird's secondary feathers are essential for its flight. "

"good business depends on having good merchandise"

"Students need to buy their textbooks before the first day of class. "

"The information about the project deadline resolved my uncertainty; now I know what needs to be completed. "

"Previously, I had planned to study for the math test on Saturday. "

"The teacher indirectly suggested that we needed to study more by mentioning the upcoming test several times. "