steelhead的用法和樣例：
例句
- Steelhead populations and rainbow trout populations can and do interbreed at different levels.
剛頭種群和虹鱒種群可以雜交，實(shí)際上也發(fā)生不同水平的雜交。 - It is possible for the offspring of rainbow trout to become anadromous and for the offspring of steelhead to develop a resident life history.
陸封的虹鱒后代可以轉變成溯河型，溯河剛頭后代也可以轉變成陸封型。
