They don't know how long it will last if it does and there are concerns about the dependability of the antibody tests themselves.

即可以实现，他们也不知道这种免疫能持续多长时间，而且人们对抗体检测的可靠性感到担。

Even in the toughest soils and under the harshest operational circumstances, the high-pull rope crowd system and the potent Kelly winch guarantee maximum performance and dependability.

即在最坚硬的最恶劣的操作环境下，高拉力绳索拥挤系统强大的凯利绞车也能保证最大的性能可靠性。

Here they write 'lab tests that detect antibodies in people need further validation to determine accuracy and reliability, again the problem is not in the immune system, we know the immune system works to defend you against virus.

在这里，他们指出" 检测人体抗体的实验室测试需要进一步的验证来确定抗体的准确性可靠性" ；再次强调，问题不在于免疫系统，我们知道免疫系统能防御病毒。