Osteoarthritis of the knees presents a particularly serious problem.
膝关节炎似乎带来了很大的问题。
But aching bones still leave researchers perplexed. Osteoarthritis of the knees presents a particularly serious problem.
但骨痛，尤其是膝盖骨关节炎仍然让很多研究者束手无策。
The problem is particularly serious for trading of farm produce such as pork.
这个问题对于像猪肉一样的农产品来说显得尤为严峻。
The current water pollution problem is particularly serious, so it is urgent to protect drinking water sources.
当前水污染问题尤为严重，保护饮用水水源刻不容缓。
The problem is particularly serious in patients with chronic pulmonary disease, in whom pre-existing respiratory acidosis may be accentuated by another illness or injury.
慢性肺部病变患者的呼吸性酸中毒情况由为严重，因为在这些患者中，先前存在的呼吸性酸中毒可因其它疾病或损伤而加重。
The problem is particularly serious in patients with chronic pulmonary disease, in whom pre-existing respiratory acidosis may be accentuated by another illness or injury.
慢性肺部病变患者的呼吸性酸中毒情况由为严重，因为在这些患者中，先前存在的呼吸性酸中毒可因其它疾病或损伤而加重。
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