The researchers also placed a sweet-smelling spray on grasses near other ponds. But that spray contained no boric acid.
研究人员也在其他池塘附近的草地上喷洒了一种有甜味的喷雾。不过这种喷雾中不含硼酸。
The researchers also placed a sweet-smelling spray on grasses near other ponds. But that spray contained no boric acid.
研究人员也在其他池塘附近的草地上喷洒了一种有甜味的喷雾。不过这种喷雾中不含硼酸。
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