因此，可交换债券的发行，以平衡这一困难局面。
Therefore, the issue of exchangeable bonds to balance this difficult situation.
恒星是一个不断地与外界发生能量和物质交换的远离平衡的开放系统。
A star is an open system that exchanges energy and matter with its exterior.
恒星是一个不断地与外界发生能量和物质交换的远离平衡的开放系统。
A star is an open system that exchanges energy and matter with its exterior.
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