当时的肿瘤是能生产激素，是功能性肿瘤，其致死率远远远远低于非功能性肿瘤。
This means the tumor was -even then - clearly still producing hormones, proving it was a functional one, which is far less deadly than the nonfunctional ones.
1980年，巴西人的心脏病致死率低于发达国家的平均水平(300人，相对于发达国家的500 - 600人)。
In 1980 the death rate for Brazilian men was below the rich-country average (300 compared with 500-600).
前者的致死作用略低于后者，而对家蝇的击倒效果却优于后者。
Their killing effect is slightly lower while the knockdown effect against housefly is even better.
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