在这种蝴蝶卵上，花边图案标记精子进入的卵孔。
On this butterfly egg, the lacy pattern marks the micropyle, where sperm enters.
本文介绍的采用套管钻进和潜孔锤钻进相结合的复合性钻进工艺，有效地解决了在卵砾石层中钻进的难题。
Difficulties are encountered in drilling in boulder formation are efficiently eliminated by using of a combined drilling technique which combines casing drilling with DTH drilling method.
观测到眶下孔数目为单孔的占93％，呈卵园形，有副孔的占7％，并测量了它们在上颌骨的确定位置。
The results show that 93% of the suborbital foramen is an oval-shaped mono-foramen and 7% has a paraforamen, their exact positions on the maxilla being measured.
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