Wheels must turn steadily, but cannot turn untended.

轮子必须稳定不停转动，不能没有管。

Negroes were running up and down the street, panic in their faces; and on porches, white children sat crying untended.

黑们惊惶失措街上跑来跑，照管的白孩子坐走廊上嚎叫。

But for the most part the sunny valley was abandoned and desolate and the untended crops stood in parching fields.

不过说，阳光炎热的山谷已荒烟，庄稼也被遗弃炽热的田里照管了。

She noted how the leaves on the trees were still dark green but dry and heavily coated with red dust, and how withered and sad the untended flowers in the front yard looked.

她只注意到树上的叶子仍是碧绿的，但明显干了，蒙上了厚厚层红尘，前院的花卉照管，也已经枯萎得不成样子。