1.
That is how "mountain strongholds" have come into being without these comrades' being aware of it themselves.
山头就是这样不自觉地垒起来了。
2.
The runner slid safely into second base.
跑者安全地滑入二垒。
3.
The fort had been hurriedly deserted.
这堡垒被仓促地放弃了。
4.
CHAPTER 3 : CASTLE COLDITZ
第三章：寇地兹堡垒
5.
The fort occupies a commanding position.
这堡垒占据控制地位.
6.
the area of a baseball field that is enclosed by 3 bases and home plate.
被本垒和一、二、三垒包围起来的棒球场地。
7.
(of a place,fort,etc)be positioned so as to control(sth)
（指地方、堡垒等）因地利而能控制（某事物）
8.
The area of the field bounded by home plate and first, second, and third bases.
内场，内野被本垒和一、二、三垒包围起来的棒球场地
9.
mine enemy trenches, forts, etc
在敌军的战壕、 堡垒等下面挖地道.
10.
place that runner must touch before scoring.
得分前跑垒者必须触到的地方。
11.
Out soldiers levelled the enemy stronghold with the ground.
我们的士兵把敌人的堡垒夷为平地。
12.
grounded to the second baseman.
打到二垒手位置的滚地球
13.
They had been the great rampart of the colony on the North.
他们一向是北部殖民地的坚强保垒。
14.
To reach base safely on(a bunt or ground ball).
安全上垒使（短打或地滚球）成为安打
15.
He honestly believed that he loved baseball.
他由衷地相信自己爱好垒球。
16.
The whole playing field.
（棒球或垒球的）整个比赛场地
17.
He mined the enemy's fort.
他暗地破坏了敌人的堡垒。
18.
Correction on the computation formula of the number of Fortresses within the domains.
修正了堡垒的领地数字的计算公式.