In others, such as Britain, the brain's stem is regarded as the crucial part. In this case simpler tests can be applied, such as whether a patient's pupils react to light.
而在其他地方，例如英国，脑干则被视为关键的部分，这样，就能应用更加简单的测试，例如病人的瞳孔是否能够对光线做出反应。
The long stem of bamboo is hollow, which makes them light and strong.
竹子长长的茎是空的，这使它很轻很结实。
Stem cell research is considered promising, although far from producing results, and other studies involve a light-responding protein and retinal transplants.
干细胞研究虽然尚未取得成果，但人们却认为前景很好。 其它的研究还包括了光反应蛋白质和视网膜移植。
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