1. They had been sawing up the fallen tree; that was why they were covered in
sawdust.
他们一直在锯那棵倒下的树，那就是他们满身有锯木屑的原因。
2. In the. saloon. the
sawdust on the floor gets changed biweekly come fog, downpour or the occasional shard of sunlight.
在大厅里，…地板上的锯木屑两周一次地变成尘雾、倾盆大雨或日光下偶尔出现的碎片。
3. Catalytic pyrolysis experiments on
sawdust were performed in a fixed-bed with nickel-based catalysts prepared by ourselves, and the products and its components were analyzed.
以锯屑为原料，使用自制的镍基催化剂，在固定床装置上进行了催化裂解实验，并对裂解产物及其成分进行了分析。
