Record of Drought and Flood Series by Tree-Ring Data in the Middle Section of Qilian Mountain Since 904 A. D.
祁连山中部公元904年以来树木年轮记录的旱涝变化。
2
If the pilot had to pull the "d" ring (ejection handle) in an emergency, the cables would snap the wearer's feet back under the seat to ensure a smooth and safe ejection from the aircraft.
当发生紧急情况，飞行员需要弹射时，缆绳会将马刺佩戴者的足部从座椅下方拉出来，以确保弹射安全。
3
RESULTS: The two novel Dring synthons are of high optical purity.