The river for building the delta was characterised by low velocity, high discharge, high concentration of fine clay and sand, and associated with reef (shoal) in delta front.

该三角洲沉积的特征是入海河流流速低而流量大，泥沙含量高而粒级细小，在三角洲前缘伴生有生物礁(滩)。

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Companies are integrated enterprises, the main core for the building or real estate, the provision of gravel, sand, brick machine, quarry and transport.

公司属综合性企业，为主要核心建筑或房地产，提供砂石、河沙、机砖、石矿及运输。

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Sand from nearby countries is the prime landfill and also essential building material for Singapore's spectacular skyline.

邻国的沙土成为新加坡奇幻城市美景建设的重要填海材料和建筑材料。

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This plant turns debris from buildings - many destroyed by Israeli air strikes - into sand and gravel that is then turned into cinder blocks for building.

VOA: standard.2010.06.16

The tide can be treacherous but the golden sand is ideal for picnics, building sand castles, watching kite surfers and, when the tide goes out, paddling in the lagoons.

BBC: Mini guide to coastal Norfolk

The sides of the quarry, where people were illegally digging for rocks and sand for use in building materials, caved in after heavy rains.

BBC: Tanzania quarry collapse kills 14 in Arusha

However, it wants to use it for tipping away "inert" clay and sand from building sites instead.

BBC: Woodeaton villagers fight quarry reopening