The heartbeat algorithm is optimized and only sent if needed (for example, if the members are already communicating for other reasons, there is no need to send an additional heartbeat message).

检测信号算法经过优化，且仅在需要时发送该信号（例如，如果成员已经因其他原因处于通信中，就没有必要再发送一条检测信号消息）。

youdao

In the latter part of 2009, after weeks of intensive discussion, Mr Obama reset the Afghan strategy and decided to send an additional 30,000 troops, pushing the American total to around 100,000.

经过数星期的深入探讨，2009年下半年，奥巴马重置了阿富汗战略，并决定增派30000军人，使美军总数达到近10万。

youdao

In the latter part of 2009, after weeks of intensive discussion, Mr Obama reset the Afghan strategy and decided to send an additional 30, 000 troops, pushing the American total to around 100, 000.

经过数星期的深入探讨，2009年下半年，奥巴马重置了阿富汗战略，并决定增派30000军人，使美军总数达到近10万。

youdao

The United States has committed to send an additional 17,000 troops to Afghanistan this year for combat and training missions.

VOA: standard.2009.03.24

Britain has promised to send an additional 500 troops to Afghanistan, bringing its force total to 9,500,second only to the United States.

VOA: standard.2009.11.17

Eikenberry assured the panel that he is behind President Obama's decision to send an additional "I am unequivocally in support of this mission,".

VOA: standard.2009.12.09

The United States is planning to send an additional 30, 000 troops to Afghanistan to halt a resurgence of the Taliban.

CNN: Post-Soviet nations to form military force

"We had an opportunity to get a fairly in-depth intelligence assessment on what's going on in Afghanistan and Pakistan, and to assess individually where we are in each and what's changed since March" when the president decided to send an additional 21, 000 troops, Gibbs said.

CNN: Gates leaning towards more troops for Afghanistan, sources say

Casey acknowledged that he had called for an additional two brigades be sent to Iraq, versus the five the president now plans to send there, but said the extra forces would be handy.

NPR: Senators Air Iraq Doubts at Confirmation Hearing