positive about的用法和样例：
例句
- He could still go to Australia. That was something he'd often toyed with but never done anything positive about.
他还能去澳大利亚，他时常会有这样的念头，但从未采取过什么积极的步骤。 - Be you positive about that?
你肯定那是午夜吗？ - Can you be positive about what you hear?
你对听到的话有把握吗？ - She was quite positive about the amount of money involved.
她对所涉及的钱数十分肯定。
positive about的相关资料：
临近单词
positive cam
positive
positive-displacement type fuel pump
positive-negative ambivalent quotient
positively definite variational problem
positive sinoatrial chronotropic effect
positive equilateral triangle structure
positive-negative pressure respirator
positively definite sequence of numbers
positive charged organic photoconductor
positive-displacement hydraulic drive
positive-pressure pnenmatic transport
