You had to prime this wall first.

你应该先刷底漆才对。

Dubrovnik's citizens mobilized and within months the first walls of Fort Lawrence were in place.

市内居民遂旋即动身，于短短数月间便建成了劳伦斯堡的首道城墙。

He flew to Mexico from Colombia and got past the first border wall to reach U.S. land.

他从哥伦比亚飞往墨西哥，越过了到达美国陆地的第一道边境墙。

They built the first walls with earth.

他们用泥土建造了第一堵墙。

We don't have an air force, but the party will get us past the first wall of security and into the main ballroom.

空军就别想了，靠公民身份 我们能穿过第一道安保门进到主宴会厅。

The manner in which the bees build is curious; they always make the first rough wall from ten to twenty times thicker than the excessively thin finished wall of the cell, which will ultimately be left.

蜜蜂建造的方式很奇怪；他们总是将第一个粗糙的壁做成比最终将留下的极薄的成品壁厚 10 到 20 倍。