sand fly  沙蝇

Lime Fly-Ash Stabilized Eolian Sand  二灰稳定风积沙

sand—sand juxtaposition  砂岩对接

fruit fly [=pomace fly]  沮丧; 挫折

Syrphid-fly or hover-fly  食蚜蝇

coastal sand and continental shelf sand  海岸砂和大陆架砂

concial sand from coarse sand  粗砂锥辗硅砂

dike of sand pile and sand quilt  砂桩砂被堤

prevent sand and confrol sand  防沙治沙

Sand-Blowing and Sand-Filling Ground Leveling  吹填砂场平

Ⅱ fly ash  Ⅱ级粉煤灰

a fly in amber  珍贵遗物

a fly in the ointment  美中不足之处; 美中不足

a fly on the wheel  自大的人

abnormally high content of carbon in fly ash  飞灰含碳量异常

Activated Fly Ash  活化粉煤灰

Active fly ash  活性粉煤灰

actived fly ash  环流化床; 改性粉煤灰

Activity of Fly Ash  粉煤灰活性