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。
Now many plants have been dispersed to other parts of the States, and unemployment, particularly among blacks, has become a serious problem.
现在，许多工厂已分散到美国其他地方，在底特律，失业，尤其是黑人失业，已经成为一个严重问题。
The spontaneous combustion of coal beds is a common problem in the coalfield in China, and particularly serious in the Jurassic coalfield in Northwest China.
煤层自然是我国煤矿中存在的一个较为普遍的问题，尤其是西北地区体罗纪煤田，煤层自然尤为严重。
Now many plants have been dispersed to other parts of the states, and unemployment, particularly among blacks, has become a serious problem.
现在，许多工厂已分散到美国其他地方，在底特律，失业，尤其是黑人失业，已经成为一个严重的问题。
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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