英语翻译1.speak up and express yourself clearly.2.sit up straigh

英语翻译翻译：Could you speak up a little?Speak for yourself!I can sit up 英语翻译【whether or not you speak up for yourself depends on you sit up straight 英文 sit up probably是什么意思 sit up exercise是什么意思 song stand up sit setting yourself up for 1.Don't sit up and work too hard at night or you'll be run__ I sit and stand up straight,shoulders back,head high. 请问怎样给小朋友讲stand up and sit down you will look at yourself up and down怎么翻译