黑乐谱蓬莱人黑化:This is the clear button for the calculator. The calculation clears the variables used in the calcu

This is the clear button for the calculator. The calculation clears the variables used in the calcu is this the reason ........????? This is the key_____my bicycle. maybe this is fate 还是the fate what is the meaning of this? : what is the meaning of this sentence? this is the case如何翻译? what is the meaning of this sentence? This is the way to negotiate the total expense This is the first two sections of the book.