您要查找的是不是：
- plunger upper helix 柱塞下螺边
- Some biological molecules have the form of a helix. 有些生物分子呈螺旋状。
- Tears are secreted by an organ under the upper eyelid. 眼泪由上眼睑下面的器官分泌。
- I'd like a room on the upper level. 我想要楼上的房间。
- My hometown is in the upper reaches of the river. 我的家乡在这条河的上游地区。
- Having a shape approximating that of a helix. 近似螺旋形的，近似螺旋线的
- He locked his diary in the upper drawer. 他把日记锁在上层抽屉里。
- He have tattoo the name "marlene" on his upper arm. 他将＂玛琳＂这个名字刺在臂的上方。
- A band or badge worn around the upper arm. 臂章戴在上臂的绑带或徽章
- A canine tooth of the upper jaw. 上颚犬齿上颚的一个犬齿
- He's between the upper and nether millstone. 他深受上下夹攻。
- This part of town is where the upper class live. 镇上这个地区是上层阶级的人住的。
- He had an infection in the upper respiratory tract. 他上呼吸道感染。
- The Senate is the upper chamber of Congress. 参议院是议会的上院。
- There were beads of perspiration on his upper lip. 他的上唇上有汗珠。
- He took a photo of the plunger in action. 跳水者正在跳水时, 他拍了张快照。
- The lower part of the pipe is separable from the upper part. 管子的下部可与上部分开。
- That is what a double helix looks like. 这就是二重螺旋线的形状。
- The life of the BeCu plunger is 2. 铍铜压射冲头的使用寿命是球铁压射冲头的2．5倍多。
- All the upper ten thousand were present at the prince's ball. 所有上流社会人士都参加了亲王的舞会。
