The insects are more likely to switch to plants with similar plant chemicals to their native host plants, in the forms of host shift, host expansion and host race formation.

有关食性分化方向的观点倾向于寄主植物转向化学物质相似的植物，表现为寄主转移、寄主扩张和形成寄主型等；

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On one hand, threads are lightweight and easy to communicate with, but on the other hand, they bring up a whole host of problems including deadlocks, race conditions, and sheer complexity.

一方面，线程是轻量级的，并且相互之间易于通信，但另一方面，它们也带来了包括死锁、争用条件和高复杂性在内的各种问题。

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Advances in medicine and science continue to race ahead, yet an ever greater proportion of the world's population is left behind for a host of reasons, including those with economic and social causes.

医学和科学方面的进展继续迅速推进，但出于众多原因，包括经济和社会因素造成的原因，越来越大比例的世界人口被抛在后面。

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But despite that assurance, officials admit India will have to race against time to successfully host the Games, because much of the work is behind schedule.

VOA: standard.2009.09.14

Japan will host a race at Fuji on 30 Sept before the penultimate round of the season in Shanghai on 7 October.

BBC: Imola is undergoing a much-needed revamp

London has been selected to host a race in the debut Formula E series, which will see electric cars race around major world cities.

BBC: London to host Formula E electric car race in 2014

The mayor believed the city had the manpower to host the race without harming recovery efforts but agreed the issue had become too divisive, the official said.

WSJ: Marathon Hits Wall Amid Criticism