The AMTI says Vietnam expanded the island here by more than 50 percent, adding defensive positions, gun emplacements and trenches.
AMTI 称， 越南将这里的岛屿扩大了 50% 以上，增加了防御阵地、炮台和战壕。
Gun emplacement
原声例句
CNN 10 学生英语综合听力 2016年9月合集
英语百科
Land battery
A land battery is a special type of gun emplacement or anti-shipping naval interdiction fortification used in coastal defense to protect areas such as anchorages, harbors, and rivers. They are also used in restricted waters such as straits or channels, or coastal inland waterways which have the tactical and strategic purpose of area denial to the enemy.
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