The course should have beautiful surroundings, and all the artificial features should have so natural an appearance that a stranger is unable to distinguish them from nature itself.
球场周围应该环境优美，所有人造的景观浑然天成，使初见者不能把它们从自然景观中分辨出来。
These vectors can have different features (such as the size of DNA-insert they can accommodate) and include plasmids, cosmids, and yeast artificial chromosomes (YACs).
这些载体具有不同的特征，包括质粒、粘粒和酵母人工染色体。
The recognition with BP artificial neural net grader shows that the recognition rate of moment features is rather high, this indicates that this method has better applicable effect.
用BP人工神经网络分类器进行识别，结果表明矩特征的识别率较高，说明该方法具有良好的应用效果。
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