1. No one has ever doubted his straightness.
    从来没人怀疑过他的率直。

1. 直线度：开启LDDM 软件,进入设定窗口,输入测量型式,直线度(Straightness)、垂直度(Squareness)使用一个光学直角规,输入待测机器相关讯息(machineinformation),决定那一部分要固定,是象限仪(quad detector ) 或激光头(laser head).

2. 平直度：straightening 矫正 | straightness 平直度 | strain 应变

1. a sexual attraction to (or sexual relations with) persons of the opposite sex

    Synonym: heterosexualityheterosexualism

2. having honest intentions

    e.g. he acted in good faith
           doubt was expressed as to the good faith of the immigrants

    Synonym: good faith

3. trueness of course toward a goal

    e.g. rivaling a hawk in directness of aim

    Synonym: directness

4. freedom from crooks or curves or bends or angles

5. (of hair) lack of a tendency to curl