并按局部电流平衡模型，计算了航天器背阴面的带电电位。

Also, according to the local current balance model, the shaded-side spacecraft potentials under the condition of no photoelectrons are calculated.

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在直立枝条上，紫胶蚧呈环状带分布，在多数倾斜枝条上，紫胶蚧分布在背阴面。

On erect branches, lac insects distributed around the branch, but on most decline branches, lac insects only settled on shaded parts.

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但上个月情况发生了变化，当美国航天局向月球恒久背阴面发射了一颗卫星，撞击产生的一缕尘埃里就有水分。

This changed last month, when NASA shot a satellite into a permanently Shadowed region on the Moon's surface, throwing a plume of material containing water up out of the shadow.

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