台湾籍旅美老师今天交给我们的句子是：

But as migration increased worldwide, nostalgia was observed in various groups. It turned out that anyone separated from their native place for a long time was vulnerable to nostalgia.
但随着全球移民人数的增长，各式各样的人都会有乡愁。结果发现：任何人在离开家乡很长一段时间后，都很容易会感受到乡愁。

学习重点：

1.migration 迁移
migration (n.) 迁移
migrate (v.) 迁徙
immigrate (v.) 移民
immigrant (n.) 移民者
immigration (n.) 移民、海关

2.nostalgia 乡愁、怀旧之情
nostalgia (n.) 乡愁、怀旧之情
nostalgic (adj.) 怀旧的

3.observe 观察
observe (v.) 观察
observation (n.) 观察力

4.separate 分隔、分离
separate (n.) 分隔、分离
separation (n.) 分开、分离

5.vulnerable 易受伤的、有弱点的
vulnerable (adj.) 易受伤的、有弱点的