cobalt based alloy

例句：

1. 1. This new alloy is much stronger than the old one.
   这种新合金比旧的强多了。
2. 2.Cobalt-based alloys are commonly used in aerospace engineering.
   钴基合金在航空航天工程中被广泛使用。
3. 3.The engineers were working on developing a cobalt-based alloy for the next generation of aircraft.
   工程师们正在研发一种用于下一代飞机的钴基合金。