hemstitch的第三人称单数（三单）为：hemstitches...

Biological systems have been doing this for billions of years.生物系统亿万年来一直都是这样。In recruiting students to Computer Systems Engineering, the University looks for evidence of all-round ability...在招收计算机系统工程专业的学生时，这个大学看重的是学生的综合...

v.补偿( redeem的第三人称单数 )，实践，解救，使…免受责难...