The course should have beautiful surroundings, and all the artificialfeatures 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。
2
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。
3
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.