loading生来说，从中学到大学的过渡会是困难的。 transmission n.传播(比如疾病)；广播。
The transmission of germs can occur by contact, breathing, and eating.细菌通过接触、呼吸和饮食传播。
transformation n. (外观或性质的)改变，改观，转变。
His character seems to have undergone a complete transformation since his marriage.他结婚之后性格判若两人。
transfer n.转移，转让；(工作的)调动；(旅途中的)换乘，改变路线。
The club's goalkeeper isn't happy here, and has asked a transfer.这个足球俱乐部的守门员在此过得不愉快，已经要求转会到其他俱乐部。