Hedges play a vital role in academic writing, so it is advisable to pay due attention to them in the process of writing academic papers.
模糊限制语在学术写作中起到非常重要的作用，在学术文章的撰写过程中应该得到足够的重视。
Due to the weakness of FECG and the effect of various noises, catching the FECG has become a big problem for signal process the academic circle.
由于胎儿心电信号本身非常微弱，加上各种噪声和干扰的影响，提取FECG成了信号处理学界的一大难题。
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