They are engaging in an embryo research.

他们正在进行一项胚胎研究。

The ancient Greeks sacrificed lambs or calves before engag<>an class="key">ing in battle.

古希腊人在打仗前用羊和小牛作祭品。

Juyuan Network Engineering Co.,Ltd is a integrated enterprise engaging in building intellectualization and system integration mainly, also selling hi-tech as bywork.

聚源一家以从事建筑智能化与系统集成为主，以产品销售代理为辅的高科技综合性企业。