Feeding in exceptionally difficult circumstances.
在极端困难情况下的喂养。
I want to pay tribute to all those working in these exceptionally difficult situations.
我要向所有在这些极端困难境况下工作的人们致以敬意。
Minefields are easy and inexpensive to set up, require almost no maintenance, and are exceptionally difficult for enemy forces to clear.
雷区的设置简单又廉价，基本上不需维护，而且敌军十分难以将其清除。
Minefields are easy and inexpensive to set up, require almost no maintenance, and are exceptionally difficult for enemy forces to clear.
雷区的设置简单又廉价，基本上不需维护，而且敌军十分难以将其清除。
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