If the soil tests lower, add garden lime to raise it.

如果土壤pH值较低，添加一些花园石灰使其升高。

Chemical soil tests were initially promising but doubts were raised and has since been discounted that life was discovered by Viking I.

化学土壤测试最初显示很有可能有生命迹象，但有人提出质疑，后来维京一号发现生命迹象的可信度也打了折扣。

Chemical soil tests were initially promising but doubts were raised and it has since been discounted that life was discovered by Viking I.

化学土壤测试最初很有希望，但后来有人提出质疑，认为“维京1号”发现了生命的说法也不太可能。