So little electricity do these panels produce under its cloudy northern skies that the emissions from a single large coal-fired power station are enough to nullify all the benefits that their carbon-free contribution might bring .
But he doesn 't want to do so in the u.s. because assuming a new job or even changing titles within his own company would nullify his existing green card application .
但他不愿在美国做，因为，换了新工作、甚至在原公司职位变了都会取消其现有绿卡申请。
In march , the ministry of finance moved to nullify the guarantees local governments provided for loans taken by their lgivs recognising that in some cases , the guarantees were the only creditworthy assets the vehicles had .
The kremlin has given mixed signals about how far it will seek to nullify these accords , and how much these moves have been caused by the missile-defence row .
