Did this strain evolve, too, in the same circumstances?
在和其上代病毒环境相同的情况下，这个病毒也会进化吗？
At the same time in the face of various working environment, strain capacity increases.
同时面对各种工作环境，应变能力也随之提高。
At the same time in the face of various working environment, strain capacity increases.
同时面对各种工作环境，应变能力也随之提高。
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