God knows just when to withhold from us any visible sign of encouragement, and when to grant us such a sign.
神知道甚么时候该不给我们看得见的凭据，甚么时候给我们看得见的凭据。
The legally recognized owner of an invention has the right to withhold or grant permission for the use of that invention, and that permission is granted through a license.
一项创造发明经法律认可的所有者具有限制或允许他人使用该发明的权利，并且这种允许是通过许可(license)的方式授予的。
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