Quad bike
n. 四輪摩托車
?? 詞語組成解析
quad
[kw?d]
n. 四倍;空鉛;（大學的）四周有建筑物圍繞的方院;四胞胎之一;
vt. 在…填補空鉛;
bike
[ba?k]
n. 自行車;摩托車;電動自行車;
vi. 騎自行車;
na. “motorbicycle”的變體;
??? 情景例句
I'm really concerned about going away for the weekend, Ellen,
我這個周末出門實在放心不下， Ellen，
I'd like to express my gratitude to you for your advice.
對于你的忠告，我想表示感謝之意。
We were both lucky. I think she is a hero too!
我們倆都很走運。我認為她也是個英雄。