on the presence信息详情
在现场
presence───n.存在；出席；参加；风度；仪态
pervading presence───无处不在的存在
revering presence───尊敬的存在
presence chamber───接见厅；n.（君主或要人的）会见厅; 客厅
presence of───……的出现；······的出现；……的存在；······的存在
in the presence of───在…面前；有某人在场；adv.在面前
towering presence───突出的存在感；高大的身材；庞大的份额
strong presence───强大的存在
genial presence───辉煌的存在
You can substitute different values based on the presence of existing values.───可以根据现有值的出现替换不同的值。
development of complex life on Earth depended on the presence of bacteria that could be consumed by larger organisms.───地球上复杂生命的发展依赖于细菌的存在，而细菌可以被更大的有机体所吞噬。
SOA governance usually relies on the presence of a registry.───SOA 治理通常依赖于注册器。
It would count on the presence of a webcam and a full desktop OS as its main selling points.───不过这款产品配备的摄像头和完整版桌面操作系统则是其主要的卖点。
No one should assume they are HIV positive or negative based on the presence or absence of any of the above symptoms.───谁都不应该由于出现以上任何一种或多种症状而胡乱猜测自己感染HIV或产生消极的心态。
An explanation for some of the disappearances focuses on the presence of vast fields of methane hydrates on the continental shelves.───对于某些失踪事件的原因，有种解释集中认为是大陆架上广阔地域存在着沼气氢氧化物。
a character inherited on an all-or-none basis and dependent on the presence of a single gene.───遗传学）一个特点的遗传取决于非完全的主要因素和单个基因的存在。
tuned to respond to hydrogen, can also report on the presence of other elements, including many that play important roles in the body.───在通常情况下调谐到反应氢的核磁共振成像扫描仪，也能记录在人体内扮演重要角色的其他元素的存在。
Abdominal examination should focus first on the presence or absence of ascites and then on the size and characteristics of the liver.───腹部体检应当首先注意有无腹水然后注意肝脏的大小和质地。
Depending on the presence of soil moisture, they are absent from very dry ground and vary in structure according to wetness.
One theory about the existence of extraterrestrial life rests on the presence of carbon compounds in meteorites.
Positive cytology was based on the presence of cells with established characteristics of malignancy as shown in Figure 2.
Acidity depends on the presence of hydrogen ions (the H in pH) and more hydrogen ions mean, counterintuitively, a lower pH.