丝发一根丝，一根头发。指功劳极微小。
出处：无
例句：无
本站使用 Cookie 等技术以提供基础功能、记住您的偏好并分析访问情况。继续浏览即表示您知晓并同意本站使用 Cookie。
This site uses cookies and similar technologies to provide core features, remember your preferences and analyse traffic. By continuing to browse, you acknowledge and agree to our use of cookies.