1.obesity n.肥胖；肥大

Obesity is a problem for many people in western countries.
西方国家很多人都有过度肥胖的问题。

2.malignant a.有恶意的；恶性的

This is a kind of very malignant tumor.
这是一种很恶性的肿瘤。

3.breast n.乳房；胸脯

The little baby can take nourishment from the breast.
小婴儿可以从乳房中吸取营养。

4.institute n.学院；学会

New methods of teaching foreign languages are adopted in this institute.
该学院采用新的外语教学法。

5.tumour n.肿瘤

A benign tumour will not cause you any fatal harm.
良性肿瘤不会对你有致命的伤害。