The soil is thin and calcareous , making agriculture very difficult .

这些岛的土壤很薄，而且是石灰质的，要发展农业非常困难。

Damage-slide coupled interaction behavior of undrained calcareous sand .

钙质砂不排水性状的损伤-滑移耦合作用分析。

Ecaussine and other calcareous monumental or building stone ; alabaster , crude or trimmed .

石灰石及其他石灰质纪念碑用或建筑用石；雪花石膏，原石或略加修整。

Calcite cementation seens a possibility where lime grains or calcareous organisms are abundant .

在灰质颗粒或钙质生物丰富的地方，方解石胶结作用似乎是有可能的。

Lower and middle eocene calcareous nannofossils from the southwestern continental shelf basin of the east china sea .

东海陆架盆地西南部海相始新统钙质超微化石。