bottom quark

例句：

1. 1. The bottom quark of the universe is still a mystery to us.
   宇宙的底部夸克仍然是我们尚未解开的谜。
2. 2. The bottom quarks in the universe are responsible for the formation of matter.
   宇宙中的底部夸克负责物质的形成。
3. 3. The discovery of the bottom quark has opened up new possibilities for particle physics research.
   发现底部夸克为粒子物理学研究开辟了新的可能性。