Well, the most recent trend within the dental industry and practices is usually to select locum tenens dentist. They are temporary dentists that appeal to certain requirements of the particular clinic limited to a few days and soon move over to a new clinic. This trend continues to be accepted in the field of medicine since a long time, however the trend has currently influenced the dental practice. One of the major factors behind the rapid expansion of this trend is the demand for dentists has increase along with the numbers of professionals usually are not sufficient to enough to focus on the requirements. As a result, just one individual creates a short lived basis in numerous clinics and chambers. Mooney and si prowse in its around the main accounting principles for enterprises ", not only emphasize to determine profits in a timely manner, and emphasizes the necessary through division operating earnings, the gains and the impact of price changes, to improve the comparability of financial statements and understandability. In many tries to define the definition of 'time'; we sometimes make use of the very word as part of the definition. Although time is definitely an ever-present concern of humans; this only clearly demonstrates the issue in formulating an obvious precise and easily understood definition this agreement we are going to all universally agree and accept. The views of munoz and sprawus Flash memory and DRAM demand growth over the long term High compression ratio if choose low grades of gasoline engine, can make the cylinder temperature rises, the incomplete combustion of gasoline, strong vibration machine, so that the output power down, damage to the parts, fuel consumption and driving. If lower compression ratio engine with high grade oil, can appear "delay" phenomenon, namely the compression ratio is less than the highest point of spontaneous combustion, as will appear incomplete combustion phenomenon, the engine is no good.