first-grade

基本解釋

Such protection zones shall be divided into first-grade protection zones and protection zones of other grades.
生活飲用水地表水源保護(hù)區(qū)分爲(wèi)一級保護(hù)區(qū)和其他等級保護(hù)區(qū)。
Certain water areas and land-based areas beyond the first-grade protection zones may be delineated as protection zones of other grades.
在生活飲用水地表水源一級保護(hù)區(qū)外，可以劃定一定的水域和陸域爲(wèi)其他等級保護(hù)區(qū)。
A first-grade teacher was having trouble with one of her students.
一年級女教師跟她的一個(gè)學(xué)生較上了勁。

Now, seven months later, Taylor is beginning to read and does first-grade math.
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