However, when carrying out systematic analysis the general multi-sequence alignment method obviously has its limitation, i. e. it cannot shake off its primary structure.

然而，在进行系统发育分析时通常的序列联配方法有明显的局限性，即无法摆脱一级结构的束缚。

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Security goes beyond most fingerprint readers, as well: while a basic swipe-and-done scan is an option, the truly cautious can require a multi-scan sequence that fends off just about any intruder.

ENGADGET: Insert Coin: PIPA Touch fingerprint reader lets phone owners authenticate most anything