Sea levels are rising globally by 3 millimetres on average .

全球海平线平均上升3毫米。

The resulting shower was light-just a couple of millimetres of snow .

由此产生的阵雪并不大，仅有几毫米降雪。

In the cyber tyre they are just a few millimetres across .

而在cybertyre中它们的直径则只有几毫米。

That means they contain spherical nodules a few millimetres across , known as chondrules .

这就是说，它们中间含有直径为几毫米的球状小瘤，即陨石球粒。

During that time , local sea levels have risen by 120 millimetres , or 2 millimetres per year on average .

在那段时间里，当地的海平面上升了120毫米，或平均每年上升2毫米。