what is up by and by

what is up by and by what 's mean by stay focus and :coming up soon what belongs only to you ,and yet is used more often by others than by yourself 怎么区分by 和during求大神帮助What is the difference between by and during? multiply your death divide by sex add up the violence and what do you get? Usable by age 13 yrs.and up answer:nothing much.just sitting around watching TV.(what is the queation?)how are you doing?orwhat are you up to?(by the way ,what is its meaning?）and why? A compound is 54.53% C,9.15% H,and 36.32% O by mass.What is its empirical 英语翻译What is done by night appears by day. What is done by night appears by day a small island has 2/5 of its surface covered by forest and 1/4 of the remainder of its surface by sand dunes.The island also has 90 hectares covered by farm land if the lsland is made up of only forest.what is the total area of the island. 英语翻译air pressure built up behind obstruction is released by lowering the tongue,and is followed by frictional noise associated with fricative portion of the sound. What time is it by your watch. What is meant by 'economic resources'? what is meant by top gun? what is your mean by saying that? what time is it by your w_______ by and