Dopamine is a key player in the reward system.

多巴胺是大脑“奖励中心”的关键组成部分。

Bacteria are key players in the formation of topsoil.

细菌是表层土壤的重要组成部分。

Researchers think a key player is the brain's intricate wiring.

研究人员认为，复杂的大脑回路是主因。

For example, plants are key players in the global carbon cycle.

例如，植物是全球碳循环的关键参与者。

She really was a key player but not in the XYZ affair.

她确实是关键人物，但不是XYZ事件中的关键人物。

He was a key player behind Iraq's 2017 offensive against the Kurds.

他是2017年伊拉克对库尔德人进攻的关键人物。

This is where this far-right Vox party comes in as a key player.

这就是极右翼政党Vox党发挥关键作用的地方。

The key player is Iran, which has extended its influence and reach inside Syria.

其中的关键角色是已经将自己的势力范围扩大到了叙利亚境内的伊朗。

And a key player in that debate was an Irish physicist named John Bell.

这场辩论的关键人物是一位名叫约翰·贝尔的爱尔兰物理学家。

Russia is a key player in all of these, and the Kremlin welcomed the deal.

俄罗斯在整个事件中发挥着关键作用，克里姆林宫对该协议表示欢迎。

You've probably heard about dopamine as it is a key player in the reward circuit.

你大概听说过多巴胺是奖励回路中的关键角色。

And if key players in that web fail, then many supply chains are in big trouble.

如果网络中的关键一环出现问题，许多供应链都会陷入大麻烦。

There are rumors that key players and classic Star Wars characters like Thrawn may end up showing up.

有传言称，主要演员以及《星球大战》的经典角色，如索龙，最终可能会出现在剧中。

The Senate trial is likely to begin in seven days with key players sworn in later this week.

参议院的审判可能会在7天之内开始，主要参与者将在本周晚些时候宣誓就职。

Today, we are focusing on some of the key players in the debate over possible U.S. military action.

今天, 我们正在关注对于美国可能采取军事行动这场争辩中的关键先生们。

" But most of all, it is their high abundance that makes them key ecological players, " Schultheiss said.

“但最重要的是，正是因为它们数量多，才使得它们成为关键的生态参与者”。

But two key players North Korea's neighbors China and Russia are not involved in the meeting in Vancouver.

但两个主要角色——朝鲜邻国中国和俄罗斯未出席温哥华的会议。

UNIDENTIFIED FEMALE: Both nations are key global players and both are now led by populous leaders.

这两个国家在世界上都是重要的参与者，它们当前都由数位领导人领导。

Areikat is calling on the US and other key players such as Egypt to get more involved in reducing tensions.

埃雷卡特呼吁美国和像埃及这样有着关键作用的国家家能采取更多措施来缓解紧张局势。

Yesterday, we looked at some of the key players in the U.S. debate over possible action against the Middle-Eastern nation.

昨天, 我们看到美国的一些关键先生们争论对这个中东国家可能采取的行动。