Ulf
n. 超低频
🗣️ 情景例句
Ellen reminds me so much of Grandma. Ellen
真让我想起奶奶。
I wish it would stay this way for the weekend.
但愿整个周末都能保持这样的好天气。
If they knew how difficult it was to drill through the hard rock, they would lose heart.
如果他们知道了钻透那坚硬的岩石有多么困难，他们会丧失信心的。