一种暂态信号，通常持续时间很短，且具有陡峭的上升边和下降边。
A transient signal, usually brief and with a discrete onset and offset .
“这种感情的强度下降得非常快，这只是因为，我们的身体不能一边承受这样愤怒的心理重负，一边正常运作。”McCullough博士说。
“The intensity of the emotion falls off precipitously, simply because the body can’t carry such a giant load of outrage and function very well, ” Dr. McCullough said.
一项由英国经济和社会研究委员会资助的研究发现，当人们边工作边喝咖啡时，工作效率会下降。
A study sponsored by the British Economic and Social Research Council found that when men drank coffee while working, it made them less effective.
当两边的扰流片都扬起时，升力就会下降，阻力增加，飞机下降。
When both are raised, overall lift fall and drag increases, so the aircraft descends.
建筑弧线形的屋檐线在靠近庄园的那一端缓缓下降，不至于阻碍庄园的景观视线，然而在靠近湖的一边徐徐上升用以打造一个突出的立面效果。
A curving roofline dips down soasnot to obstruct views to and from the manor, but sweeps upwards to form a more prominent facade at one end, where the landscape descendstowards the lake.
当一个扰流片扬起的时候，另一边的机翼就会下降。
如果你一边转一边下降，女士将无法移动她的腿。
If you lower as you rotate, she cannot move her left leg, and you get a plain oversway .
然后再将重心侧向转移到另外一边，身体不能下降，保持肌肉收缩同样的时间。
Shift your weight laterally, all the way to the other side, without lowering your body and hold an equal contraction.
连杆小头孔中心与连杆小头孔毛坯外圆中心不同心，使一边孔壁变薄，强度下降。
Decentraction of the conn-rod small end hole center with the excircle center of the conn-rod small end hole blank, which causes the hole wall of one side getting thin with the strength dropping.
把热维斯先生的担忧放在一边，这确实表明食品公司或其他航空公司因为过度竞争而安全度下降。
Setting Mr Gervais's worries aside, it is rarely suggested that food firms or airlines are less safe because of too much competition.
结构的颤振失稳风速呈下降趋势，最低颤振失稳风速出现在成桥阶段，临时墩的架设和边跨合拢对结构的颤振稳定性有提升作用。
The erection of the temporary piers in side spans and the completion of the side spans can improve the aerodynamic stability of the bridge under construction.
结构的颤振失稳风速呈下降趋势，最低颤振失稳风速出现在成桥阶段，临时墩的架设和边跨合拢对结构的颤振稳定性有提升作用。
The erection of the temporary piers in side spans and the completion of the side spans can improve the aerodynamic stability of the bridge under construction.
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