他论证说,生物是由于一些小的遗传变异的积累而逐渐演变的.He argued that organisms evolve gradually by accumulating small hereditary changes.蛋白酶是阻止非典病毒变异的关键物质.A protease is key to the replication of the virus.标准离差是变异的正直根.The standard deviation is the...
She succumbed to weariness and went to bed.她疲惫不堪，上床睡觉了。I noticed, behind the neutrality of his gaze, a deep weariness.我注意到他不露声色的注视背后藏着深深的厌倦。He could forget, in a measure , the weariness of the street and his tiresome sea...