The most challenging field in environmental engineering practice at the present time is the treatment and disposal of industrial wastes . 在现今工程环境实践中，最引人注目的领域大概是工业废物的处理和处置。
At the present time retainers are being manufactured of phenolic laminates and porous nylons, but other materials ranges are being investigated . 目前，保持架是用酚板和多孔的尼龙制造的，但其他材料也在进行研究中。
Critic dialogue : heidegger and marx ' s meeting at the present time 海德格尔与马克思在当代的相遇
How does micro - market affect our products at the present time 现在宏观市场对我们产品影响如何？
Q : how does micro - market affect our products at the present time 现在宏观市场对我们产品影响如何？
At the present time , there are two choices for motor control ic 目前，电机控制芯片主要有两种选择。
Social risks facing our country at the present time : prevention and control 我国目前面临的社会风险及其控制
At the present time , many stock exchanges have the etf trades 目前,世界许多国家的交易所都有etf挂牌交易。
. . . at the present time . turn to page 394 翻到394页
Most of the clinical types hla by serology at the present time 现阶段hla分型，临床上多采用血清学分型方法。
