- A novel active matching layer made of lead zirconate titanate (PZT) plate has been developed as an “impedance matching layer” for high-intensity focused ultrasound (HIFU) applications.
- The orient has been playing an active role in the world economy.
- He is an active member of the school's stamp club.
- An active volcano may explode at any time.
- Is it wise to engage in active sports at your age?