1.
Aseismic and seism-reducing modeling study for entrance of two-track tunnels
双洞隧道洞口段抗减震模型试验研究
2.
The hole yawned before him.
洞口在他面前豁然而开。
3.
They blocked the entrance to the cave with big rocks.
他们用石头堵塞了洞口。
4.
Large boulders obstructed the entrance to the cave.
大石头堵住了洞口。
5.
He had only found the first grotto;
他只找到了第一个洞口。
6.
The three boys spewed out of the mouth of the cave.
三个男孩拼命往洞口跑。
7.
and the stone rolled on top of the hole.
石头就滚到了洞口上方。
8.
But the cave never opened again.
但那洞口再也没打开过。
9.
A big rock blocked the mouth of the cave.
一块大石头堵住了洞口。
10.
he took two small paces into the cave's open mouth.
他挪了两步到了洞口。
11.
Two openings have been made in these caves;
此窟共有洞口二处；
12.
an opening that resembles a mouth (as of a cave or a gorge).
象嘴的口子（比如洞口或峡谷口）。
13.
When she had made a hole in the entrance she tried to pass through it.
他在洞口上打开了一个洞，就想从里边钻出来。
14.
Technical Measures for Safe Excavating of the Upper Portal of the Head-Tunnel in Zhao City
皂市导流洞洞口段上层开挖施工安全技术措施
15.
Discussion on the Construction Scheme of Tunnel Entrance in Crowded Population Area
隧道洞口位于人群聚居区出洞施工方案探讨
16.
Construction technology of soft surrounding rock in portal section with lateral pressure of Jindong tunnel
津洞隧道洞口偏压段软弱围岩施工技术
17.
"aperture: an opening, such as a hole, gap, or slit."
孔,洞: 开口,如洞、缝隙或缺口
18.
An opening, such as a hole, gap, or slit.
孔，洞开口，如洞、缝隙或缺口