ceiling hole

przewalskii is composed of parietal eye and pineal body.

荒漠沙蜥（Ｐｈｒｙｎｏｃｅｐｈａｌｕｓｐｒｚｅｗａｌｓｋｉ）松果复合体由顶眼和松果体组成，而顶眼比其它蜥蜴的发育完善，具有角膜、晶体、玻璃体和视网膜，与其侧眼结构很相似，但不能视物，只能感光，是高度发达的类眼器官。

Blasthole logging and supervision of blasthole sampling.

记录炮眼数据，并监督炮眼采样工作。

The lower gun-ports were now below water,

下层炮眼已淹没在水里，

strip-borer drill

露天矿水平炮眼钻机

millisecond round

迟发毫秒爆破炮眼组

perforation compacted zone

炮眼四周挤压密实层

solidly packed tunnel

充填密实的炮眼孔道

permeability of tunnel fill material

炮眼充填材料的渗透率

partially sand packed perforation

地层砂部分充填的炮眼

shotgun marriage [ wedding ]

【采矿】不平衡爆破的炮眼

He says all he has to do is turn around.

爸爸说，他打炮眼呀，打炮眼呀，一扭头就看见我了!

All gun-ports were open and the muzzles peeped wickedly from them.

所有的炮眼都开着，炮口不怀好意地从炮眼里向外窥探。

Before charging work is started, the drill holo is plugged.

开始装药以前，先将炮眼下端眼口堵死。

When a normal bench round is fired the general result is for the centre of gravity of the round to be moved forward.

起爆普通梯段炮眼组时，一般的结果是炮眼组的重心前移。

A flared opening for a gun in a wall or parapet.

枪眼，炮眼在墙或护墙上开的用于射击的洞口

The window was an embrasure in an enormously thick wall.

窗户是个炮眼，墙壁异乎寻常的厚。

Levelling is usually carried out with vertical drill holes.

整平爆破通常用垂直炮眼进行。

Our min wait until the gunner lit their matches in the cannon - port

我们的人等到火炮瞄准手在炮眼点燃了火柴才行动

Our men waited until the gunners lit their matches in the cannon-ports.

我们的人一直等到炮手在炮眼点燃了火柴才行动。