Ukraine's defence minister gave assurances that the cluster bombs would not be used in urban areas.

乌克兰国防部长保证不会在城市地区使用集束炸弹。

The United States has confirmed that US-supplied cluster bombs are being used in Ukraine as part of its offensive against Russia.

美国证实，乌克兰正在使用美国提供的集束炸弹，用来攻击俄罗斯。

The other team, led by Eros Vanzella at the National Institute for Astrophysics in Italy, used a massive galaxy cluster as a starlight-magnifying " gravitational lens" to zoom in on a tiny background galaxy from about 800 million years post-big bang.

另一个研究小组由意大利国家天体物理研究所的埃罗斯·范泽拉领导，他们利用一个巨大的星系团作为星光放大的" 引力透镜" ，来放大大爆炸后形成的、约 8 亿岁的一个微小背景星系。