They have screwed up the door so that it can not be opened.

The threads of the screw are worn.

螺丝磨坏了.

A screw with a good bite.

螺丝咬得紧.

The screws are loose; I must tighten them.

螺丝松了, 我得把它们拧紧.

The top is turning like a screw.

那顶端象螺丝一样地旋转着.

He screwed the box together.

他用螺丝把盒子拧紧.

Will you tighten this screw; it's very loose.

你把这个螺丝拧紧好吗, 它太松了.

Install the forward nut attaching the handle to the door.

安装把车门手柄固定在车门上的前向螺帽.

These bolts and nuts hold the wheels on.

这些螺栓和螺帽把轮子固定下为.

Installation: Just fix the nut on the housing with bolts.

安装: 只需固定在房屋的螺栓螺母.

Remove the fast fill lever cap, and loosen the lock nut.

拆卸快速进水手柄帽, 松开紧锁螺母.

Does the bolt fit the nut?

螺栓与螺母不配.

The front and back leg quadriceps contract, extending the knees and stretching the lower region of the hamstrings.

股四头肌前侧和后侧收缩，伸直膝盖、伸展腘旁肌下部。

We combined anterograde venogram and percutaneous popliteal venogram to be lower limbs segment venogram.

我们将顺行造影和经皮腘静脉插管造影相结合，称为“下肢静脉分段造影法”。

Conclusions The PFL was one of posterolateral structure of knee, and it constantly existed but variable.

结论腘腓韧带是组成膝关节后外侧重要结构之一，但其形态变异较大；

Mascherano has been ruled out of Tuesday's UEFA Champions League trip to Fiorentina after picking up a hamstring problem in training.

由于训练中腘绳肌腱拉伤，马斯切拉诺已经被排除在欧冠联赛对阵佛罗伦萨的比赛名单之外。

Keep spine lengthened. Do not allow low back to shift or twist. If hamstrings are too tight, place a towel under buttocks.

保持脊柱收紧，不要让下背部抬起或旋转，如果腘绳肌太紧，放一个浴巾在臀部下面。

Autograft bone-patellar tendon-bone, hamstring tendon, allograft bone-patellar tendon-bone are selected commonly by arthroscopy doctors.

自体骨-髌腱-骨，腘绳肌腱，异体骨-髌腱-骨是关节镜医生最常选用的三种移植物。

He went to see the doctor straight away and we found he had a small problem in his hamstring.

然后他立即去找了队医，确实了他的腘绳肌腱出了点问题。

To protect an injured hamstring, fold forward into Uttanasana while bending the knee on the injured side enough to eliminate any discomfort.

为了保护受伤的腘绳肌，做站立前屈伸展式时，弯曲疼痛一侧腿的膝盖来消除不适感。

Patients were independently reviewed, and the mean postoperative isotonic hamstring strength was compared with that on the uninjured side.

患者均单独接受检查，损伤侧肢体的术后平均等张腘绳肌力将与对侧未损伤肢体进行对比研究。