其疗效
Its therapeutic effect
以上为机器翻译结果，长、整句建议使用 人工翻译 。
尚无科学研究证明其疗效。
No scientific studies prove their effectiveness.
youdao
其疗效是惊人的。
The results can be spectacular.
据传塞润榈有生发功效，但是其疗效并没有临床证据。
The saw palmetto plant is often said to help hair growth, but there is little clinical evidence concerning its efficacy.
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