This is a significant step forward for our collective security.
这是走向集体安全的重要一步。
When collective security is at stake, public opinion can carry great weight.
当涉及集体的安全时，舆论是举足轻重的。
Theory of collective security is a postwar concept of security.
集体安全理论是战后出现的一种安全构思。
Theory of collective security is a postwar concept of security.
集体安全理论是战后出现的一种安全构思。
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