Big cities, with all their pollution, have an effect on trees...... No doubt.
大都市的环境污染对树有影响……毫无疑问。
There was no big difference of the effect between different rare earth salts and complexes.
各种稀土盐类及其配合物对多种芽孢菌的抑菌活性差别不大；
There was no big difference of the effect between different rare earth salts and complexes.
各种稀土盐类及其配合物对多种芽孢菌的抑菌活性差别不大；
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