掘到第五下或是第六下时，鹤嘴锄碰到了一样铁东西。
At the fifth or sixth blow the pickaxe struck against an iron substance.
磁铁矿颗粒氧化按温度划分为两段，在较低温度下主要是铁离子扩散，较高温度下氧离子扩散的扩散能力增强。
Oxidation of magnetite grains is divided into tow stages, according to temperature, and iron ion diffuses at lower temperature and diffusion amount of oxygenic ion increases at higher temperature.
环状沟土壤浸施铁肥在不断根的情况下很难被根吸收，断根情况下吸收、输机制与根系输液相同。
Generally, it is difficult to be absorbed by roots when iron fertilizer was drenched into soil.
铁硫化物在高温下的再活化产物主要是磁黄铁矿，而低温下则主要为黄铁矿。
Remobilized iron sulphides will precipitate as pyrrhotite at high temperatures and as pyrite when temperature decreases.
铁硫化物在高温下的再活化产物主要是磁黄铁矿，而低温下则主要为黄铁矿。
Remobilized iron sulphides will precipitate as pyrrhotite at high temperatures and as pyrite when temperature decreases.
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