The insects were examined under magnification.这些昆虫是放大后加以观察的。The magnification is 833,333 times the original size.放大倍数为实物大小的833,333倍。Pores are visible without magnification...毛孔无须放大就可以看见。Pores are visible without magnific...
半深海 - 深海相区 、 滨浅海相区和三角洲相区是较为有利的油气分布区.The bathyal - abyssal facies , littoral facies , neritic facies and delta facies are beneficial to and gas exploration....