1) hearing drum problem
听鼓问题
1.
Let Ω be a bounded domain in Rn,this paper obtains a new estimate of its first eigenvalue in term of the radius of the ball which has same volume with it,and the result gives a negative answer to the hearing drum problem in some extent.
对欧氏空间Rn中的任一有界区域Ω,用与其等体积的Rn中的球体B(R)的半径给出其第一特征值的下界估计,在一定程度上否定回答了听鼓问题。
3) acoustic difficulty
听音问题
4) pre-listening question
听前问题
5) the do-not-understand problem
"听不懂"的问题
6) problems of English listening in junior high schools
初中英语听力问题
补充资料:听鼓
【诗文】:
城头叠鼓声,城下暮江清。欲问渔阳掺,时无祢正平。
【注释】:
【出处】:
全唐诗:卷539-35
城头叠鼓声,城下暮江清。欲问渔阳掺,时无祢正平。
【注释】:
【出处】:
全唐诗:卷539-35
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条