英语语法分析

Confidence is the greatest motivity of life.

自信是人生最伟大的动力！

She is either the man's motivity of struggling or the man's heart-backing and recursive harbor.

她是男人奋斗的动力，是男人心灵的依靠，是男人回归的港弯。

Science and technology is productivity, the modern civilization foundation and the core motivity that go forward.

科学技术是生产力，是近现代人类文明前进的基础和核心动力。