The white belt signifies that he's an absolute beginner.

白腰带表示他完全是个新手。

Why did the police wear a white belt?

为什么警察要系白皮带？

The white belt-like rivers were gleaming in the sunshine.

白丝带似的河流在阳光下波光粼粼。

The dark blue belt indicates the near earth space with white belts as atmospheric envelops.

深蓝色条带代表近地空间，其中白色条带代表大气圈层。

Being in this wide desert, almost no trace of mankind can be found in the sky, even though accidentally an airplane passes by swiftly and lefts a long white belt, they will be disappeared in a minute.

在广袤无垠的大漠里，天空看不到丁点儿人类留下的痕迹。即便偶尔有飞机掠过，撒下一条长长的白，瞬间也会消逝不见。