Maintenance of reservoir pressure
[经] 保持油层压力
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
Are you ready to go?
准备好动身吗？
Can Paul really suspect their stories are lies?
保罗真的在怀疑他们的故事是编造的吗？
Then grow some tomatoes in one box which has plant food in the soil and some in another box which doesn't.
然后，在一个箱子里种一些西红柿，里面的土有养料，而在另一个箱子里也种一些，但里面的土没有养料。