How serious are fertility problems today? People don't want to give birth,can't afford it, and can't give birth that has become the "three mountains". The problem of childbirth is related to the people's livelihood. Whether a country can prosper or n…
Nanomaterials are widely used in cosmetics because of their unique optical, thermal and electromagnetic properties.…
The recent visit by US House Speaker Nancy Pelosi has boosted US-Taiwan relations at a time of increasing tension between Washington and Beijing. She vowed that the United States would protect Taiwan's democratic autonomy. "The United States is still…
Based on the principles of general chemical and engineering plastics the strength, strength, flame retardancy in impact resistance, toughness as well as antibacterial properties of plastics can be improved through filling the strength, and strengthen…