With lasers scientists can probe many physical processes, such as combustion, once beyond our ken.视野
A、understandingA
暂无解析
ThecompanyissuesanannualreporteveryMarch.
Some sea urchins海胆 have venomous (toxin) spines
Whencarbonisaddedtoironintheproperproportions,theresultissteel.
Urbanrenewalprogramsstrivetoupgradeareasthatarebecomingslums.
An oversight 遗漏 (miss, overslaugh) in proofreading often results in printed errors.
