unselected needle

例句：

1. 1. The tailor carefully selectedthe finest threads for his garments.
   裁缝仔细挑选了最优质的线来制作他的衣物。
2. 2. The artist used a variety ofmaterials to create her masterpiece.
   艺术家使用了各种材料来创作她的杰作。
3. 3. The scientistused unselected needles to test thestrength of the material.
   科学家使用未选择的针头来测试材料的强度。