如果你说你是出于兴趣而选择这个学科，这是没有说服力的。
It is not convincing if you say you have chosen the subject because you enjoy it.
我觉得这是没有说服力的。
如果完好有效而且没有说服力，这是无用的，对于任何实际经验来说。
If it's sound and valid and not persuasive it's pretty useless for any practical practice.
但是因为意大利的机构们没有做出更进一步的举动，而仅仅提出了一些没有意义没有说服力的警告，这是很可悲的。
But for the Italian authorities not to have taken any further action, rather than just issue some lame warnings, is just pathetic.
但是因为意大利的机构们没有做出更进一步的举动，而仅仅提出了一些没有意义没有说服力的警告，这是很可悲的。
But for the Italian authorities not to have taken any further action, rather than just issue some lame warnings, is just pathetic.
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