at middle C, but listeners on the ground：定在中央C音上 然而地面上的聽眾

The expert trumpeters on the train certainly held their pitch constant... | at middle C, but listeners on the ground|定在中央C音上 然而地面上的聽眾 | heard the tone change as the locomotive puffed by.|...

on the ground that：[基于]

.on the contrary[反之> | .on the ground that[基于> | .on the one hand[一方面>

on the ground that：由于

197. on the behalf of代表 | 198. on the ground that由于 | 199. on the roots of以...為根源

He was fired on the ground that he was lazy：他因偷懶而被免職

The snow lay thick on the ground. 地上的雪積得很厚. | He was fired on the ground that he was lazy. 他因偷懶而被免職. | on the increase在增長中:

on the ground of：根據(jù)...;以...為理由

on the contrary反之,正相反 | on the ground of根據(jù)...;以...為理由 | on the road在旅途中

on the ground of：理由

on the gad 閑蕩 | on the ground of 理由 | on the ground 在地上

on the ground of illness：以健康不佳為理由

on the ground of 以...為理由,為根據(jù) | on the ground of illness 以健康不佳為理由 | → playground 操場,運(yùn)動場

on the ground：趴下!趴在地上! 現(xiàn)在就趴在地上

Get down! Get down!|趴下!... | Get down! On the ground! On the ground, now!|趴下!趴在地上! 現(xiàn)在就趴在地上! | Stop! Leave her alone!|住手!放開她!

thin on the ground：為數(shù)不多; 寥寥無幾的

19 break new ground開墾處女地,開辟新天地; 創(chuàng)新 | Lose ground失去地盤; 處于不利的地位 | Thin on the ground為數(shù)不多; 寥寥無幾的

song accompanied by stamping on the ground：踏歌

V.i. & t.(1) To step on, stamp on: 腳踏實(shí)地 stand on solid ground, practical, always have regard for facts; | 踏歌 song accompanied by stamping on the ground; | 踏繩 walk on tightrope;