心脏移植手术挽救了很多人的生命。

Heart ___transplants have saved many lives.

春天是移植番茄苗到花园的最佳时节。

Spring is the best time for ___transplants of tomato seedlings to the garden.

这位来自南方的移居者不太适应北方的寒冷冬天。

The southern ___transplant had trouble adjusting to the cold winters up north.