Why are the lupanine derivatives bitter ?

么白金雀儿碱的派生物是苦的？

Examples of ''ablaut'' as a grammatical marker in Latin are the vowel changes in the perfect stem of verbs.

例如在日耳曼语强动词中的元音换是印欧动词形范例的直接派生。

A new concept is proposed,under which by utilizing a proven simple-cycle marine gas turbine a type of intercooling-cycle high-power marine gas turbine has been derived.

提出利用成熟的简单循环用燃气轮机将其派生一型间冷循环大功率用燃气轮机的新构想,并且原发动机燃气发生器的通流部分和结构大部分保持不,承原机的可靠性。