before top dead center
在上死点前在上止点前
before bottom center
下死点前在下止点前
after top center
上死点后在上止点后
The trailing edge of the fourth notch, which causes the pulse, is four degrees before top dead center (TDC) of the corresponding piston.
产生的脉冲的第四凹槽的后缘，位于相应的活塞在前上死点（TDC）4度的位置的位置上。
The teacher calls over the children's names before the class begins.
教师在上课前点名。
a convict awaiting execution is allowed to drink before going to the block
死囚在上断头台前被允许喝酒。
He nearly died of exposure on the cold mountain.
他在寒冷的高山上差一点没有冻死。
Ben Rosseli, in the coffin up ahead, was better off than Celia because his life had ended conclusively
躺在前面棺材里的班·罗塞利死得至少干脆爽快，从这一点上说，他比西莉亚走运。
The bead is put on the foreheads of the dead shepherd ahead of the herd.
珠子被戴在牧群前面的死牧羊人的前额上.
He was last seen leaving his office in New Town at about7 p. m.
他死前最后离开的地点位于新市区的办公室，大约晚上7点。
The struggle that precedes death.
垂死挣扎在死前的挣扎
at nine o'clock. I must go to bed before half past ten tonight.
9 点。我今晚必须在10 点半前上床睡觉。
The doctor said the problem lied in its forelimb and it would not die.
医生说问题在于它的前肢上，不过它不会死的。
He was a tenacious beast. On the very ladder he lingered.
他这死不甘心的家伙，在舷梯上踌躇不前了。
The man that was drowned nine days ago off Maiden's rock.
九天前有个男子在少女岩的海面上淹死了。
Two TDC (Top Dead Center) sensors are mounted at the rear of the single camshaft.
两个上死点的传感器安装在凸轮轴的后面。
The cook smeared some oil on his hands before he made the cake.
厨子在做点心以前在手上抹了些油。
after bottom dead center
下死点后在下止点后