The time taken from insertion to ejaculation varies widely from one man to another .
从插入到射精的时间长短因人而异。
Dynamic ad insertion startup kiptronic , for instance , has already changed its focus away from small publishers to major media companies .
比如说，经营动态广告插入的初创公司kiptronic就把关注焦点从小发行商转向主要媒体公司。
Researchers have tried to define premature ejaculation by considering the average time from insertion to ejaculation in 18 to 30 year old men as the standard .
研究人员尝试以18到30岁之间的男士从插入到射精的平均时长作为标准，并据此定义早泄。
The insertion device , about a fifth of the diameter of the riser itself , is not supposed to block the flow of oil completely .
插入装置大约只有立管直径的五分之一，不可能完全抑制原油流出。
But these methods , which require the insertion of a needle or tube into the womb or placenta , can cause miscarriages in about 1 % of all cases .
