Definition: Strong relationships last for a long time, and are not easily spoiled. Level: B1
他们的友谊历经多年依然坚固。
Their friendship remains ___strong after many years.
我们有着非常牢固的家庭纽带。
We have very ___strong family ties.
他们的关系已经变得非常牢固。
Their relationship has grown very ___strong.
