1.He is going to descant on the beauties of the scene.
他将详述风景的。
2.You need not descant upon my shortcomings.
你不必絮说我的缺点。
3.The boy singers were asked to descant on the tune.
要求男孩子们唱高音部分。
4.The results show that with the increasing of intensity of disturbance,DI and ED of all species go up to class A then go down,excluded that ED of shrubs layer present S?like descant and DI and ED of herb layer in "S" patterns come down to class C then ascend. Excepting that Dd of herb layer rise to class A then descend and DD of vive layer go up to class C then go down,DD of other layers shows linear increase.
结果表明:随着人为干扰强度的加大,除灌木层均匀度略呈"S"型下降、草本层多样性指数和均匀度呈"S"型下降至C级后上升外,其他层次物种多样性指数和均匀度都为上升至A级后下降,而优势度除草本层上升至A级后下降,层外植物上升至C级后下降外,其他层次都呈线性上升。 表5参13
5.To sing or play a descant.
演唱（或演奏）高音部
6.The girl students were asked to descant on the tune.
女生们被要求唱高音部分。
7.sing a descant on a main tune or melody.
以主调或悦耳的音调唱着评论。
8.He is going to descant on the theme of our human mystery.
他将在人类奥秘这个主题上作详细的评论。
