■林國賓
原文：
NASA has started preventing Chinese nationals with valid visas from participating in its programs due to security concerns, reports suggest.
This action, which the agency claims is a security necessity, also highlights the growing space race between the U.S. and China.
The policy shift, initially reported by Bloomberg News, was confirmed by NASA press secretary Bethany Stevens on Wednesday, September 10. According to a Bloomberg report, the policy took effect on September 5.
In a statement, Stevens said, "NASA has taken internal action pertaining to Chinese nationals, including restricting physical and cybersecurity access to our facilities, materials, and network to ensure the security of our work."
Reportedly, Chinese nationals working as contractors or students on NASA research projects were suddenly locked out of IT systems and prohibited from attending in-person meetings. The individuals who shared this information with the outlet did so anonymously.
The policy change comes amid escalating anti-China rhetoric and growing competition for dominance in space.
中譯：
根據報導，美國航空暨太空總署（NASA）基於安全考量，近日開始限制持有合法簽證的中國大陸公民參與其計畫。
NASA表示，此舉是出於安全考量的必要措施，也凸顯美「中」太空競賽日益升溫。根據彭博新聞報導，這項政策9月5日生效、10日由NASA發言人史蒂文斯證實。
她在聲明中指出：「NASA已採取內部措施，限制中國大陸公民在實體與網路安全上的接觸，包括禁止進入設施、查閱資料與使用內網，以確保研究工作的安全。」
報導說，以外包人員或學生身分參與NASA研究計畫的多名中國大陸公民，資訊科技系統突遭封鎖，並被禁止出席會議。由於事件敏感，消息人士均以匿名方式向媒體透露相關內情。
此一政策轉變正值美國國內反「中」輿論升高之際，也凸顯兩國在太空領域的競爭日益激烈。
-關鍵軍語-
※space race：太空競賽
※contractor：外包商