A log algorithm typically is one where you cut the size of the problem down by some multiplicative factor.

对数级复杂度的算法就是指,通过一系列常量级步数的操作,可以将问题的规模。

麻省理工公开课 - 计算机科学及编程导论课程节选

"One thing Twitter should be looking at now is for any account which is verified to have a two factor log-in process, " he told the BBC.

BBC: Technology

On Facebook, for example, two-factor authentication is triggered when users try to log in in an unexpected way, such as from a computer in a different country.

BBC: Technology

Cosy log cabins and romantic cottages with heated spas and open fireplaces continue the charm factor.

BBC: Exploring Queensland��s rainforest hinterland