台湾籍旅美老师今天交给我们的句子是：

A concussion is a traumatic brain injury that alters the way a person's brain functions. Their effects are usually temporary, but they can include headaches and problems with your memory, balance, and coordination. They often occur from a blow to the head, but they can also happen from a strike anywhere else due to the head and upper body being violently shaken from the force.
“脑震荡”是种创伤性的脑部损伤，它会改变一个人大脑的运作方式。这些影响通常只是暂时性的，但可能会出现头痛、失忆、平衡感和协调能力上出问题。脑震荡通常是头部受到重击而引发，但也有可能是由于头部或上半身受到猛烈摇晃后，进而使得身体其他部位受到重击所致。

学习重点：

1.concussion 震动、冲击、脑震荡
concussion (n.) 震动、冲击、脑震荡

2.traumatic 创伤的
traumatic (adj.) 创伤的
trauma (n.) 伤口、创伤

3.injury 伤害
injury (n.) 伤害
injure (v.) 伤害
endure (v.) 忍受

4.temporary 临时的
temporary (adj.) 临时的