At the same time the differentiation process of the root primordium, and the effect of hilling up with earth on the process have been carefully followed.
一年生插条苗的根原基形成时间、部位和分化的过程，以及培土措施对根原基分化的影响。
Carbon dioxide stays in the atmosphere for up to a century after it is emitted, and has the effect of trapping heat on earth, causing climate change.
二氧化碳被排放后，在大气层中的留存时间高达一个世纪，它能阻止热量从地球散发出去，从而导致气候变化。
The moon gravity meter has good experimental effect on the earth before landing on the moon, but it can't normally work when astronaut set up the gravity meter on the moon on schedule.
登月前在地球上进行的试验效果良好，但是，当宇航员按登月计划在月球上布置好重力仪后，却不能正常工作。
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