Why are the lupanine derivatives bitter ?

为什么白金雀儿碱派生物是苦？

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元音变换是印欧动词变形范例直接派生。

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.

提出利用成单循环用燃气其派生为一型间冷循环大功率用燃气新构想,并且原发动燃气发生器通流部分和结构大部分保持不变,以继承原可靠性。