比赛前给马服用兴奋剂是违法的。
我一点也没有想过他会服用兴奋剂来增强他的表现。
I just think it is a mistake by forgetting to ask 'can I take that?
他还称王静作为国内顶尖的田径运动员根本没有必要去服用兴奋剂。
He added that Wang is a top athlete who has no need to take stimulants.
因此在这种情况下，服用兴奋剂的目的是关闭MSTN基因。
In this case, therefore, the doping is designed to switch the gene off.
他被怀疑服用了兴奋剂，但他的尿样检测却呈阴性的。
He was suspicious of having taken dopes, but his urine test was negative.
他被怀疑服用了兴奋剂，但他的尿样检测却是呈阴性的。
He was suspicious of having taken dopes, but his urine test was negative.
他被怀疑服用了兴奋剂，但他的尿样检测却是呈阴性的。
He was suspicious of having taken dopes, but his urine test was negative.
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