Yuan Longping, whose breakthroughs in rice strains relieved hunger and poverty in Asia and Africa, was 90.

袁隆平，享年90岁。他在水稻品系方面取得的突破性成果缓解了亚洲和非洲的饥荒和贫困。

Engineers calculate the strains and stresses on a bridge.

工程师们计算桥梁的应变和应力。

There are various antagonistic strains in endophytic bacteria in Hami melon plants.

哈密瓜内生细菌中广泛存在高抗菌活性的菌株。

That rapid replication rate also increased the chances of strains evolving in ways that allowed them to evade hog immune systems.

那样迅速的复制速度也增加了菌株进化的机会，使它们能够用种种方式避开猪的免疫系统。

Every year new strains of influenza develop.

每年都有新的流感类型出现。

There are many different strains of flu virus.

有许多不同类型的流感病毒。