He affected illness so that he need not go to work. 他裝病以便不去上班。
The length of any leg of a speed course should be long enough so that inadvertent timing errors do not introduce appreciable errors into calculated speed. 速度課程的任何腿的長度應該夠長的,以便不注意的時間安排錯誤不引導可感知的錯誤進入有計劃的速度。