In the northeastern United States, it rains intermittently 间歇地 throughout the spring.

TheNativeAmericaninterpreterSacajaweawasavaluablememberoftheLewisanddarkexpeditionin1805.

All living organisms, regardless of their unique identity, have certain biological, chemical, and physical characteristics in common.

With the acquisition of smaller companies by larger ones, the 1960's saw a wave of new conglomerates.

Communication is one of the most important bonds that hold cultural systems together.