实际上，当你按下快门时，一套复杂的程序开启，包括镜头内光圈的设置、一块单镜头反射镜的升起和其他更多的步骤。
When you press the shutter release on the camera, a complex sequence of events occurs, including setting the aperture in the lens, flipping up the mirror of an SLR and a lot more.
目的：探讨腹腔镜下套扎法治疗输卵管间质部妊娠临床效果。
Objective: To approach clinical effect of laparoscopic interstitial tubal pregnancy therapy with loop ligature method.
宇航员的任务是做对哈勃太空望远镜的最后一套维修。
The astronauts' mission is to do a final set of repairs on the Hubble Space Telescope.
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