Other researchers are working on gene therapy as another approach to cure sickle cell disease, but progress has been slow.
其他研究者正在钻研基因疗法，这也是镰形细胞贫血症的另一疗法，然而进展很缓慢。
A number of agrochemical companies, including Bayer and Syngenta, have been looking at ways to make complex protein drugs in plants, although progress has been slow.
一些农用化学品公司，包括拜耳和先正达，一直在寻找方法使植物表达复杂的蛋白质类药物，但是进展相对缓慢。
"Progress has been slow, but there has been an increased emphasis on cheerleading safety," said the study's author Frederick O. Mueller.
研究报告的作者弗雷德里克。O .穆勒说：“虽然进展缓慢，但人们越来越重视啦啦队安全问题了。”
Progress has been slow and serious challenges remain in the global response to addressing cyber security threats and in promoting Internet governance.
目前，国际社会在应对网络安全威胁、推进互联网治理等方面进展缓慢，挑战依然严峻。
Progress has been slow and serious challenges remain in the global response to addressing cyber security threats and in promoting Internet governance.
目前，国际社会在应对网络安全威胁、推进互联网治理等方面进展缓慢，挑战依然严峻。
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