Pentaborate
五硼酸盐
🗣️ 情景例句
Many kings and emperors used silver chopsticks to see if their food was poisoned.
许多帝王用银制的筷子以检查他们的食物中是否被人投了毒。
I ate too much candy. I have a toothache.
我吃了太多的糖果。牙齿在痛哩。
hold the string so that the weight nearly touches the ground.
让重物几乎接触地面。