下渡(Xiàdù)在龙门县城西北10公里。属天堂山乡。清光绪年间(187 5—1908)村民从上渡迁此。因处朱古?渡头下方而得名。
虽然农民工凭借团结的力量并在第三方的支持下开始向资方的“前台”地位发出挑战，但是资方并不会轻易让渡权利。
While the migrant workers challenged to the "front" position by their union and a third party, but it would not easily alienate the rights of employers.
该方法在一定的量化标准下利用小渡变换提取图象的特征信息，通过混沌序列对其加密生成数字水印。
In this method, the original image 's feature is extracted by using wavelet transform and quantization. The feature information is changed into watermark by the chaotic sequence encryption.
扶手绳甚至在渡溪者处于被确保状态下，都是个好用的帮手。
The hand line may be a useful aid even if the wader is belayed as below.
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