1.
The upper or exterior curve of an arch.
拱背线拱顶上面或外缘的曲形线
2.
Faults: Weak or slack back; roached back; sloping topline.
缺点（合格）后躯看上去瘦削并且背部松弛；背部拱形状；背线倾斜。
3.
Continue rolling the cover downward and engage the hogrings attaching the seatback cover to the seatback cushion support wires.
继续向下旋转座椅背盖，接上固定座椅背盖到座椅背垫支架线的拱起环。
4.
arched: Forming an arch or a curve like that of an arch.
拱形结构的: 形成拱或类似于拱的曲线。
5.
Forming an arch or a curve like that of an arch.
拱形结构的形成拱或类似于拱的曲线
6.
an arch with a straight horizontal extrados and a slightly arched intrados.
一种拱背水平、拱的内面有个轻微弯曲的拱形。
7.
To cause(the back) to arch like that of a hog.
像猪那样地拱起（背）
8.
jump vertically, with legs stiff and back arched, as of horses.
垂直跳，腿僵直，后背拱起。
9.
Control of the Shape of Concrete Fill Steel Tube Arch Bridge s Rib While it is Installation;
钢管混凝土拱桥拱肋吊装中的拱轴线形控制
10.
To cause to form an arch or similar curve.
使成拱形使形成拱或类似曲线
11.
Design Optimization on Axial Cord of Concrete Filled Steel Tube Arch Bridge;
钢管混凝土拱桥拱肋线形的设计优化
12.
an arch with mutually supporting voussoirs that has a straight horizontal extrados and intrados.
有水平拱背和水平的内弧面的互相支撑的拱石的拱。
13.
the exterior curve of an arch.
拱形的外部表面曲线。
14.
an arch formed in a continuous curve.
形成一个完美曲线的拱。
15.
The cat arched its back when it saw the dog.
那猫看见狗时就拱起了背.
16.
He is hunched over his cup, dissatisfied.
他拱着背，手中拿着杯子，自怨自艾。
17.
When the animals were roused, there was a paroxysmal cough with the back arched.
动物们惊起时，则有发作性咳嗽和拱背。
18.
TWO NEW SPECIES OF GENUS LORDIPHOSA(DIPTERA,DROSOPHILIDAE)
拱背果蝇属二新种记述(双翅目,果蝇科)