基本解释：额外根
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Re-Os isotopic age dating of molybdenite separates from Elegen porphyry Mo (Cu) mineralized area, northwestern Alxa, western Inner Mongolia;内蒙古额勒根斑岩型钼(铜)矿化区辉钼矿铼-锇同位素年龄及地质意义
Quantity and the properties of the surface of root and rhizosphere soil sample from five different land use patterns on southwest of Shandong were studied by chemical analysis and microbial plate culture.采用微生物平皿培养和化学分析法,在鲁西南地区选取5种不同土地利用方式,分别对根际、根外土壤微生物数量与养分状况及其相互关系进行了研究。
extra pay for extra work额外工作的额外报酬
additional amount for unexpired risk未过期风险的额外款额
additional dependent parent allowance供养父母额外免税额
additional expenses;additional cost;charge extra额外费用(会计学)
additional dependent grandparent allowance供养祖父母或外祖父母额外免税额
To add(an extra thing or amount)with no additional charge.外加，额外奉送无偿地加入（额外的东西或数量）
To give a discount for or to add an extra sum to cover something作为对某事补偿，给折或额外增加数额
The extra premium Incur be to be pay by the buyer .额外保险应由买方负担。
additional expense-strike罢工险额外费用保险
pieces damaged from extra work额外工作的损坏工件
We do not ask for extra pay.我们不要求额外报酬。
You have to pay extra for an express train.你搭快车必须额外付钱。
extraneous duties allowance (supplementary duties)额外职务津贴（附加职务）
Is there an extra nighttime charge?要额外付夜间费用吗?
contingency fund and additional expenditures应急基金和额外开支
How much extra do I have to pay?我必须额外多付多少？
The latter will, of course, involve extra expense.后者当然要付额外开支．
extraneous duties allowance (responsibility)额外职务津贴（责任）
