YCLDSP-F28335-II 源代码

(MA) Now let's focus on comics in the 1950's. Early in the decade sales were down, so publishers started looking for some new angl…

(MA) Today I want to talk to you about wasps and their nests. You'll recall that biologists divide species of wasps into two group…

(WA) I was really glad when your club invited me to share my coin collection. It's been my passion since I collected my first Linc…

(WA-MM) Not long ago, some of you may have read about a team of mountain-climbing scientists who helped to recalculate the elevati…