句子采用了 'It is advisable to do' 的形式，其中 it 为形式主语，真正的主语是后面的不定式短语。
To achieve success and establish merit, one must understand the times, know how to adapt to opportunities, and act accordingly.
In a sense, life is also a war. In this war, one must be cautious when dealing with others, maintaining a prudent lifestyle and attitude. It is advisable to remain vigilant towards unfamiliar people, consider preventive measures, and leave some room for escape to avoid regret later.
Sun Tzu emphasized that in warfare, one should not be bound by conventional methods but should adapt to the situation and act appropriately. The core of this is flexibility. If a commander can accurately grasp changes in the enemy, their own forces, and the terrain, and make timely decisions, they can seize the initiative and achieve victory.
In today's increasingly competitive world, flexibility allows you to unite with opponents to gain a strategic advantage. It also stimulates fresh thinking and unique inspiration, bringing unexpected wealth and success.
The commander-in-chief is the leader of the team and the pillar of team spirit. Therefore, to destroy or disband a team, the focus of the attack should be its core figure. Once they are defeated, the team will become leaderless. As the saying goes: "To shoot the rider, first shoot the horse; to capture the bandit, first capture the king."
凡人若想成就事业、建立功勋，必须认清时务，懂得因机而变，相机而动。
从某种角度看，人生也是一场战争。在这场战争中，与人打交道时需谨慎小心，保持审慎的生活方式和态度。对于不太熟悉的人，不妨多持戒心，考虑防患对策，为自己留些“逃生”余地，以免事后追悔莫及。
孙子强调用兵作战要不拘常法、临事适变、从宜而行，其核心在于灵活性。若指挥者能准确把握敌情、我情、地情等各方面的变化，及时下定决心，便能把握主动权，夺取胜利。
在竞争日趋激烈的今天，变通能使你与对手团结一致，获取制胜先机；更能激发你产生新鲜的思想与独具特色的灵感，带来意想不到的财富与成功。
主帅是团队的领袖人物，是团队精神的支柱。因此，要消灭和瓦解一个团队，攻击的重心应是其核心人物。一旦将其击倒，团队便会群龙无首。正如俗话所说：“射人先射马，擒贼先擒王。”