The rudder plays a secondary role during a turn it is used to prevent yawing.

在转弯时，方向舵发挥的作用仅次于离心力，方向舵用来防止偏航。

Liver damage is probably associated with body immunity. HBV mutation maybe play a secondary role in Liver damage.

肝损伤可能主要与机体免疫等相关，HBV变异仅起次要作用。

The D3R knock-out mice have also been generated. The results from these mice show D3R plays a secondary role in physiological condition.

其次，D3R基因敲除小鼠研究提示，正常生理状态下D3R仅表现辅助功能；

The primary function of the ACL is restraint to anterior tibial translation, although its secondary role in rotational stability is also important.

前交叉韧带的主要功能是限制胫骨前移，其维持旋转稳定的次要功能也很重要。

The secondary role of the server is to listen in on a stream for events (a new edit, a message, or ticker change) and efficiently push responses back to clients.

服务器的第二个角色就是监听事件流(一次修改，一条信息，或者股票的实时变化)，并能高效的返回响应给客户端。