quadruples

v.

（使）成四倍( quadruple的第三人称单数 )；

1. For example, a farm built on cheap oil suffers when crude prices quadruple.
   例如，一个在原有便宜时建起来的农场，会在原油价格变成四倍时遭受损失。
2. Crowding in England is almost double that of Germany and quadruple the population density in France.
   英国人口密度大约是德国人口密度的两倍，是法国人口密度的四倍。

Quadruples
Unemployment Quadruples Among German Doctors
A covering of triples by quadruples
On the covering of pairs by quadruples I
Coupled‐cluster method truncated at quadruples
Skeletal Quads: Human Action Recognition Using Joint Quadruples
Problems of linear algebra and classification of quadruples of subspaces in a finite-dimensional vector space.
Coupled-cluster connected quadruples and quintuples corrections to the harmonic vibrational frequencies and equilibrium bond distanc...
Extension of the method of moments of coupled-cluster equations to excited states: The triples and quadruples corrections to the equ...
Diffusion coefficients of zirconocene–borate ion pairs studied by pulsed field-gradient NMR—evidence for ion quadruples in benzene...