“Ràng wǒ kǎo lǜ yī xià.” = Please let me consider this for a moment. <br>The answers to your questions:<br>a) “Ràng” means “allow me or let me”. <br>“kǎo lǜ” is “consider” as opposed to “xiang3” which is “think”. <br> b)The accent for “lǜ” is called “Qing Sheng” meaning “soft intonation” it means pronounce this word “lightly”, usually when there is a repetitive character, the light accent marks would be used, for example the chinese characters “ma ma” mother, the second character should be accented with this “qing sheng”<br> Hope this help.