Secu
abbr. 标准电子控制单元（Standard Electronic Control Unit）
🗣️ 情景例句
He's an aerospace engineer,and works for Orlando Aircraft Corporation.
他担任航太工程师，为Orlando飞机公司工作。
Nothing is difficult to a man who wills.
世上无难事，只怕有心人。
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低点）、浪高（从波谷到浪峰的垂直距离）