Roll-cumulus
n. 滾軸積云
?? 詞語組成解析
roll
[r?ul]
vt. 輾;使（眼球等）左右轉(zhuǎn)動(dòng);（使）原地轉(zhuǎn)圈;滾動(dòng);
vi. 左右搖晃;翻滾;開始移動(dòng)，啟動(dòng);
n. 名冊(cè);滾翻;
n. 積云, 堆積物\\n[醫(yī)] 丘
??? 情景例句
Do you feel like going to the cinema?
你想去看電影嗎？
People greet one another with Happy New Year.
人們相互祝福“新年好”。
Our next obstacle was a shallow pool of water about half a mile across.
下一個(gè)障礙是一片約半英里寬的淺水塘。