词组短语
by oneself独自地,单独
by and large大体上,总的来说
by and by不久以后
权威例句
Refinement of Macromolecular Structures by the Maximum-Likelihood MethodExcited state calculations in solids by auxiliary-field quantum Monte CarloProfiling of complex microbial populations by denaturing gradient gel electrophoresis analysis of polymerase chain reaction-amplifie...Isolation of a cDNA clone derived from a blood-borne non-A, non-B viral hepatitis genomeLearning representations by back-propagating errorsInvestigating causal relations by econometric models and cross-spectral methodsMulti-organ, multi-lineage engraftment by a single bone marrow-derived stem cellExtension of Life-Span by Introduction of Telomerase into Normal Human CellsExpression monitoring by hybridization to high-density oligonucleotide arraysTapestry: An Infastructure for Fault-tolerant Wide-area Location and Routing