Yabla video uses of 科学研究

Yìng
zhì
gāng
长期 chángqī
从事 cóngshì
老龄 lǎolíng
科学研究 kēxuéyánjiū
Ying Zhi Gang has conducted long-term scientific research on the elderly.
15 15
nián
科学研究 kēxuéyánjiū
9 9
xiàng
国际 guójì
专利 zhuānlì
15 years of scientific research. 9 top international patents.