Spiral cast
[医] 螺旋[状]管型
🧩 词语组成解析
spiral
['spaɪrəl]
n. 螺旋（线）;旋涡;螺旋形物;（足球运动的）旋球;
v. 使成螺旋形;螺旋式的上升（或下降盘旋上升（或下降）;
adj. 螺旋形的;盘旋的;盘旋上升的;
cast
[kɑ:st]
vt. 铸造;投掷;投射;脱落，脱皮;
n. 铸型;演员表;轻微的斜视;投，掷骰;
vi. 掷，投;计算，加;
🗣️ 情景例句
She is in a meeting until night.
她开会要开到晚上。
Nothing is really beautiful but truth.
只有真理才是真美。
This is because they had no natural enemies until the arrival of humans and therefore did not need to develop flying wings.
这是因为人类到达这里之前，这些鸟没有天敌，因此，它们不需要发育飞行的翅膀。