1. In a laboratory, they used genetic and chemical techniques to derive cells that resembled precursors to sperm.
2. The Badarian culture and the successor Naqada series are generally regarded as precursors to Dynastic Egyptian civilization.
3. 911查询·英语单词
3. The precursors were mostly fund managers, often originating from the Silicon Valley and largely composed of Chinese returnees.
4. precursors的解释
4. The Kyoto University researchers managed to induce mice stem cells into creating sperm precursors, which were transplanted into infertile male mice.
5. Gatlin announced on July 29 he had tested positive for testosterone or its precursors following a relay race in Kansas in April.
6. He tested positive for the male sex hormone testosterone and its precursors at a Kansas relay meeting in April.
7. The abuse of official vehicle privileges and other irregularities concerning public cars are considered precursors to corruption.
8. The German team used a strain of human fat cell precursors, called preadipocytes.
9. More showers and thundershowers are expected precursors to declining autumn temperatures, weather experts said.
10. The Olympic and world 100 metres champion said he had failed a test for testosterone or its precursors.