Background level
本底水准
🧩 词语组成解析
level
['lɛvl]
n. 水平，水准;水平线，水平面;水平仪;[物]电平;
adj. 水平的;同高度的;平均的;平稳的;
vt. 使同等;对准;弄平;
vi. 拉平;（用枪等）瞄准（与 at 连用）;变得平坦;将（话、批评等）对准目标;
vi. 瞄准;拉平;变得平坦;
🗣️ 情景例句
It's stopped snowing.
雪停了。
Experience teaches.
经验给人教训。
The Ombudsman immediately wrote to the Chief of Police in the district asking him to send a record of the case.
司法特派员立即写信给当地警察局长，请他寄送与此事有关的材料。