existential
adj
1 (fml 文) of or relating to (esp human) existence (尤指人类)存在的; 与(人类)存在有关的.
2 of or relating to the theory of existentialism 存在主义的; 与存在主义有关的.
It soon became clear that the straight part of the dance changed when the sun's position changed. If the feeding place was toward the sun, the dancer headed straight upward during the straight part of the wagging dance.