英语语法分析

Bartonella spp. is highly resistant to freezing and freeze-thaw cycles.

巴尔通体菌株对冷冻和反复冻融有很强的抵抗力。

Since the early 1990s, more than 20 species of Bartonella bacteria have been discovered.

自90年代以来，已经有超过20种以上的巴尔通体属细菌被发现。

Objective to study the methods and condition on preservation and recovery of Bartonella SPP.

目的探索巴尔通体菌株保存和复苏的方法及其条件。