sighless

是什么意思

sighless

adj.sigh的变形

sigh[sai]

vi.
- 叹气，叹息：
  to sigh with helplessness
  无奈地叹息
- 发出叹息般的声音；(风等)呼啸，悲鸣：
  sighing wind
  呼呼的大风
- 悲叹，痛惜：
  to sigh over something
  为某事而悲叹
- 想念；渴望：
  to sigh for hometown
  想念家乡
vt.
- 叹息着表示；悲叹，痛惜：
  to sigh one's youth lost early
  悲叹青春早逝
- 在叹声中浪费(或虚度)：
  to sigh away one's days
  在叹声中虚度光阴
n.
- 叹气，叹息
- 叹息声
- 叹息般的声音；(空气等的)流动声；(风等的)呼啸(声)，悲鸣(声)

学习怎么用

权威例句

On a signless Laplacian spectral characterization of T -shape trees
Some graphs determined by their (signless) Laplacian spectra
The (signless) Laplacian spectral radius of unicyclic and bicyclic graphs with n vertices and k pendant vertices
On some forests determined by their Laplacian or signless Laplacian spectrum
Signless Laplacian spectral radii of graphs with given chromatic number
Sharp bounds on the signless laplacian spectral radii of graphs ☆
On the distance and distance signless Laplacian spectral radii of bicyclic graphs
THE SUN GRAPH IS DETERMINED BY ITS SIGNLESS LAPLACIAN SPECTRUM
On the reduced signless Laplacian spectrum of a degree maximal graph
Relation between Energy and (Signless) Laplacian Energy of Graphs

s开头的单词