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- It would be unwise to change tack now. 现在改变方针是不明智的。
- Tack the folds down before you sew them firmly into place. 先用大针脚将褶子松松地缀住，然后再将其缝纫到位。
- The chemical symbol for copper is "Cu". 铜的化学符号是Cu。
- What color is copper sulphate solution? 硫酸铜溶液是什么颜色？
- I hammered a tack into the wall and hung a small picture from it. 我在墙上钉了一个图钉，然后在上面挂了一张小图片。
- Copper and gold are both metals. 铜和金都是金属。
- Copper has less resistance than lead. 铜的电阻比铅的小。
- The speaker suddenly changed tack and left us all rather confused. 演讲人突然改变了论调，把我们都搞糊涂了。
- What color is copper sulfate solution? 硫酸铜溶液是什么颜色？
- A copper coin formerly used in India and Pakistan. 安那旧时在印度和巴基斯坦使用的铜币
- Ornamental copper pans hung on the wall. 墙上挂着装饰性的铜盘。
- His brother is sharp as a tack; he got100 on every test. 他弟弟十分聪明伶俐，每次考试都得100分。
- This mountain road leads to the copper mine. 这条山路通向那个铜矿。
- She thinks I'm going out with Jeremy but she's completely on the wrong tack. 她认为我准备同杰里米外出，但是她的想法完全错了。
- Brass is an alloy of copper and zinc. 黄铜是铜和锌的合金。
- We fuse copper and tin to make bronze. 我们把铜和锡熔制成青铜。
- Joe hammered a tack into the wall to hang a picture. 乔用锤子把一只大头钉敲进墙中用来挂一幅画。
- They will mine copper there in the valley. 他们将在那边的山谷开采铜矿。
- Brass is formed by the fusion of copper and zinc. 黄铜是由铜和锌熔合制成的。
- Copper conducts electricity better than iron does. 铜的导电性比铁强。
