"Firm" Natural Recordings by Native Speakers
Strong and steady in opinion, purpose, or determination; resolute.
Example: "She's a firm believer in the importance of recycling."
Firewood refers to logs or branches of wood that have been cut and prepared for use as fuel for a fireplace, stove, or campfire. It is typically wood that is dry and has been seasoned, meaning it has been allowed to dry for a period of time to reduce its moisture content, making it easier to burn.
A firework is a type of pyrotechnic device that produces a colorful display of light, sound, and heat when ignited. Fireworks are often used to celebrate special occasions such as holidays, weddings, and sporting events. They typically consist of a fuse, a propellant, and an explosive mixture of chemicals that release gas and particles at high speed, creating a burst of light and sound when ignited.
Firmicutes is a phylum of bacteria that includes many types of gram-positive bacteria. Firmicutes bacteria are typically rod-shaped and have a thick peptidoglycan cell wall. This phylum includes many important genera, such as Bacillus, Staphylococcus, and Lactobacillus. Firmicutes are found in a wide range of environments, including soil, water, and the human body. They play important roles in decomposition, fermentation, and biocontrol, and some species are also important human pathogens.